What is the product?

Answer:

[tex]y\left(1.4\right)=0.992[/tex].

Step-by-step explanation:

The Euler's method states that [tex]y_{n+1}=y_n+h \cdot f \left(x_n, y_n \right)[/tex], where [tex]x_{n+1}=x_n + h[/tex].

To find [tex]y\left(1.4 \right)[/tex] for [tex]y'=- 4 x y + 4 x[/tex] when [tex]y\left(1 \right)=0[/tex], with step size [tex]h=0.2[/tex] using the Euler's method you must:

We have that [tex]h=0.2=\frac{1}{5}[/tex], [tex]x_0=1[/tex], [tex]y_0=0[/tex], [tex]f(x,y)=- 4 x y + 4 x[/tex].

Step 1.

[tex]x_{1}=x_{0}+h=1+\frac{1}{5}=\frac{6}{5}[/tex]

[tex]y\left(x_{1}\right)=y\left( \frac{6}{5} \right)=y_{1}=y_{0}+h \cdot f \left(x_{0}, y_{0} \right)=0+h \cdot f \left(1, 0 \right)=0 + \frac{1}{5} \cdot \left(4.0 \right)=0.8[/tex]

Step 2.

[tex]x_{2}=x_{1}+h=\frac{6}{5}+\frac{1}{5}=\frac{7}{5}=1.4[/tex]

[tex]y\left(x_{2}\right)=y\left( \frac{7}{5} \right)=y_{2}=y_{1}+h \cdot f \left(x_{1}, y_{1} \right)=0.8+h \cdot f \left(\frac{6}{5}, 0.8 \right)=0.8 + \frac{1}{5} \cdot \left(0.96 \right)=0.992[/tex]

The answer is [tex]y\left(1.4\right)=0.992[/tex]

Answer:

45,697,600 license plates can be formed of 4 letters followed by 2 numbers

Step-by-step explanation:

There are 4 letters in the plate. In the alphabet, there are 26 letters. So each of the four letters in the plate can have 26 outcomes.

There are 2 digits in the place. There are 10 possible digits.

How many possible plates?

26*26*26*26*10*10 = 45,697,600

45,697,600 license plates can be formed of 4 letters followed by 2 numbers

Answer:

(a)23 (b)90 (c)3

Step-by-step explanation:

The equation for the line of best fit for this situation is given as

[tex]y=\frac{3}{10}x+8[/tex]

where x=average temperature in degrees

y=average number of hot dogs she sold,

(a) The expected number of hot dogs sold when the temperature is 50° would be___hot dogs.

When x=50°

[tex]y=\frac{3}{10}X50+8=15+8=23[/tex]

When the temperature is 50°, the expected number of hot dogs sold would be 23.

(b)If the vendor sold 35 hot dogs, the temperature is expected to be ___degrees.  

If y=35

[tex]35=\frac{3}{10}x+8\\35-8=\frac{3}{10}x\\27=\frac{3}{10}x[/tex]

Multiply both sides by 10/3

[tex]27 X \frac{10}{3}= \frac{3}{10}x X \frac{10}{3}\\x=90^{0}[/tex]

If the vendor sold 35 hot dogs, the temperature is expected to be 90 degrees.  

(c) Based on the line of best fit, for every 10-degree increase in temperature, she should sell 3 more hot dogs.

Answer:

a) E(x)=3.565

b) c=3.8475 --> P(X < 3.8475) = 0.75

c) The probability that X falls above or below 0.28 min from the mean is P=0.4954.

Step-by-step explanation:

We have the cumulative distribution function as information.

a) To calculate the expected value, we can calculate the value of x in which F(x) equals 0.5. This happens for x=3.565.

[tex]F(x)=\frac{x-3}{1.13} =0.5\\\\x-3=0.5*1.13=0.565\\\\x=0.565+3=3.565[/tex]

b) What is the value c such that P(X < c) = 0.75?

In this case, we have to calculate x to have F(x)=0.75

[tex]F(x)=\frac{x-3}{1.13} =0.75\\\\x-3=0.75*1.13=0.8475\\\\x=0.8475+3=3.8475[/tex]

This happens for x=3.8475.

c) We have to calculate the probability that X falls above or below 0.28 min from the mean (x=3.565).

This is the probability that the time is between 3.285 and 3.845

[tex]x_1=3.565-0.28=3.285\\\\x_2=3.565+0.28=3.845[/tex]

We can calculate this as:

[tex]P(3.285<x<3.845)=F(3.845)-F(3.285)\\\\F(3.845)=\frac{3.845-3}{1.13}=\frac{0.845}{1.13}= 0.7478\\\\F(3.285)=\frac{3.285-3}{1.13}=\frac{0.285}{1.13}= 0.2522\\\\\\P(3.285<x<3.845)=F(3.845)-F(3.285)=0.7478-0.2522=0.4956\\\\[/tex]

The probability that X falls above or below 0.28 min from the mean is P=0.4954.

Answer:

The solution and complete explanation for the above question and mentioned conditions is given below in the attached document.I hope my explanation will help you in understanding this particular question.

Step-by-step explanation:

Answer:

96% CI for the production of seeds

[tex]1177.5\leq\mu\leq2520.5[/tex]

Step-by-step explanation:

We have a sample of size n=28. With these data we can calculate the mean and standard deviation of the sample.

Sample = [2450, 2504, 2114, 1110, 2137, 8015, 1623, 1531, 2008, 1716, 721, 863, 1136, 2819, 1911, 2101, 1051, 218, 1711, 1642, 228, 363, 5973, 1050, 1961, 1809, 130, 880 ]

Sample mean = 1849

Sample standard deviation = 1647

To calculate a 96% confidence interval, we use the t-statistic with df=27.

The t-value for this condition is t=2.1578.

[tex]M\pm t_{27}*s/\sqrt{n}\\\\1849\pm2.1578*1647/\sqrt{28}\\\\1849\pm671.5\\\\\\1849-671.5\leq\mu\leq 1849+671.5\\\\\\1177.5\leq\mu\leq2520.5[/tex]

Then, the 96% interval is

[tex]1177.5\leq\mu\leq2520.5[/tex]

The 96% interval is [117.5,2520.5] and this can be determined by using the t-statistics and the given data.

Given :

The sample mean for this is 1849 and the standard deviation is 1647.

Use t-statistic with df = 27 to calculate 96% confidence interval. So, the t-value is 2.1578.

[tex]\rm M\pm t_{27}\times \dfrac{s}{\sqrt{n} }[/tex]

[tex]1849\pm 2.1578 \times \dfrac{1647}{\sqrt{28} }[/tex]

[tex]1849\pm 671.5[/tex]

[tex]1849-671.5\leq \mu \leq 1849+671.5[/tex]

[tex]117.5\leq \mu \leq 2520.5[/tex]

Therefore, the 96% interval is [117.5,2520.5].

For more information, refer to the link given below:

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The probability of event A is 1/2, the probability of event B is 5/18, and the probability of event C is 1/36.

To find the probability of each event, we need to analyze the possible outcomes and count the favorable outcomes for each event.

a) Event A: The sum of the numbers is odd.

Out of the 36 possible outcomes (6 outcomes for the first die and 6 outcomes for the second die), 18 outcomes have an odd sum. Therefore, the probability of event A is 18/36 = 1/2.

b) Event B: The sum of the numbers is 10 or more.

Out of the 36 possible outcomes, 10 outcomes have a sum of 10 or more. Therefore, the probability of event B is 10/36 = 5/18.

c) Event C: A 3 appears on each of the two dice.

Out of the 36 possible outcomes, only 1 outcome has a 3 on each die. Therefore, the probability of event C is 1/36.

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A. The probability that the sum of the numbers is odd is [tex]\(\frac{1}{2}\)[/tex].

B. The probability that the sum of the numbers is 10 or more is [tex]\(\frac{1}{6}\)[/tex].

C. The probability that a 3 appears on each of the two dice is [tex]\(\frac{1}{36}\)[/tex].

First, note that each die has 6 faces, so the total number of possible outcomes when two dice are tossed is:

[tex]\[ 6 \times 6 = 36 \][/tex]

A. The sum of two numbers is odd if one number is even and the other is odd.

- Dice faces: {1, 2, 3, 4, 5, 6}

- Odd faces: {1, 3, 5}

- Even faces: {2, 4, 6}

For each of the 3 odd faces on the first die, the second die can show any of the 3 even faces. Similarly, for each of the 3 even faces on the first die, the second die can show any of the 3 odd faces.

So, the number of favorable outcomes:

[tex]\[ 3 \times 3 + 3 \times 3 = 9 + 9 = 18 \][/tex]

The probability of event A is

[tex]\[ \frac{18}{36} = \frac{1}{2} \][/tex]

B. Let's list the pairs of dice faces whose sums are 10 or more:

- Sum = 10: (4, 6), (5, 5), (6, 4)

- Sum = 11: (5, 6), (6, 5)

- Sum = 12: (6, 6)

Number of favorable outcomes:

[tex]\[ 3 + 2 + 1 = 6 \][/tex]

The probability of event B is

[tex]\[ \frac{6}{36} = \frac{1}{6} \][/tex]

C. This event means both dice show 3:

- Outcome: (3, 3)

Number of favorable outcomes: 1

The probability of event C is [tex]\[ \frac{1}{36} \][/tex]

Answer:

a) P(B'|A') = P(B') = 1 - 0.7 = 0.3.

The reasoning is that: since, events A and B are independent, then, events A' and B' are also independent and for independent events, P(A|B) = P(A).

b) P(A u B) = 0.82

c) P[(A n B')|(A u B)] = 0.146

Step-by-step explanation:

P(A) = 0.4

P(B) = 0.7

A and B are independent events.

P(A') = 1 - 0.4 = 0.6

P(B') = 1 - 0.7 = 0.3

a) If the Asian project is not successful, what is the proba- bility that the European project is also not successful?

P(B'|A') = P(B') = 1 - 0.7 = 0.3

The reasoning is that: since, events A and B are independent, then, events A' and B' are also independent and for independent events, P(A|B) = P(A).

b) The probability that at least one of the two projects will be successful = P(A u B)

P(A u B) = P(A) + P(B) - P(A n B) = 0.4 + 0.7 - (0.4)(0.7) = 0.82

OR

P(A u B) = P(A n B') + P(A' n B) + P(A n B) = (0.4)(0.3) + (0.6)(0.7) + (0.4)(0.7) = 0.82

c) Given that at least one of the two projects is successful, what is the probability that only the Asian project is successful?

P[(A n B')|(A u B)] = }P(A n B') n P(A u B)]/P(A u B) = P(A n B')/P(A u B) = (0.4)(0.3)/(0.82)

P[(A n B')|(A u B)] = 0.146

Hope this Helps!!!

Answer:

The distribution of the time it takes to manufacture the products can be explained by the continuous Uniform distribution.

Step-by-step explanation:

An Uniform distribution is the probability distribution of outcomes that are equally likely, i.e. all the outcomes has the same probability of occurrence.

Uniform distribution are discrete and continuous.

A discrete uniform distribution describes the  probability distribution of discrete random variable that assumes discrete values. For example, roll of a die.

A continuous uniform distribution describes probability distribution of continuous random variable that assumes values in a specified interval. For example, time it takes to reach school from home.

In this case let the random variable X be defined as the time it takes to manufacture a product.

To manufacture 1 unit the time taken is between 5 to 6 minutes.

Every value in the interval  5 - 6 has equal probability.

The distribution of the time it takes to manufacture the products can be explained by the continuous Uniform distribution.

The probability density function of a continuous Uniform distribution is:

[tex]f(x)=\left \{ {{\frac{1}{b-a};\ x\ \epsilon\ [a, b]} \atop {0;\ otherwise}} \right.[/tex]

Answer:

0.1975

Step-by-step explanation:

Let the probability of getting heads on flipping the coin = p

Then the probability of getting tails on flipping the coin = 1-p

It is given that probability of heads is twice the probability of tails.

[tex]\[p= 2* (1-p)\][/tex]

[tex]\[=> p= 2 - 2p\][/tex]

[tex]\[=> 3p= 2 \][/tex]

[tex]\[=> p= \frac{2}{3} \][/tex]

So that probability of getting a head on single coin flip = [tex]\[\frac{2}{3}\][/tex]

This means that the probability of getting heads on 4 coin flips =

[tex]\[ p^{4} \][/tex]

[tex]\[= (\frac{2}{3})^{4} \][/tex]

[tex]\[= 0.1975 \][/tex]

Probability of an event is the measure of its chance of occurrence. The probability of all 4 tossed coins in given context coming out as heads is 0.197 approximately.

Binomial distributions consists of n independent Bernoulli trials.

Bernoulli trials are those trials which end up randomly either on success (with probability p) or on failures( with probability 1- p = q (say))

Suppose we have random variable X pertaining binomial distribution with parameters n and p, then it is written as

[tex]X \sim B(n,p)[/tex]

The probability that out of n trials, there'd be x successes is given by

[tex]P(X =x) = \: ^nC_xp^x(1-p)^{n-x}[/tex]

For the given case, let model the condition as:

Success = getting head on given biased coin

Probability of success = p = 2/3 (as head comes twice as often as tails, so probability of heads = twice probability of q = x say,

then 2x + x = 1(total probability is 1), or x = 1/3 = probability of tails,

thus, probability of heads= 2/3)

Failure = getting tail on given biased coin

Probability of failure = q = 1-p = 1-2/3 = 1/3

All coins' results are independent, thus, they are Bernoulli trials.

The count of Bernoulli trials is n = 4

Let random variable X tracks the number of heads obtained on tossing these 4 given biased coins.

Then,

[tex]X \sim B(4,2/3)[/tex]

The needed probability is

P(X = 4)

Using the probability function of binomial distribution, we get:
[tex]P(X = 4) = \: ^4C_4(2/3)^4(1/3)^0 = \dfrac{16}{81} \approx 0.197[/tex]

Thus, The probability of all 4 tossed coins in given context coming out as heads is 0.197 approximately.

Learn more about binomial distribution here:

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Answer:

Step-by-step explanation:

You can find your answer in attached document.

Final answer:

the null hypothesis is retained and the P-value for this result is greater than 0.05, constituting a lower bound on the P-value.

Explanation:

The experiment involves a single-factor ANOVA with four levels of the factor and six replications per level. The computed value of the F-statistic is F0 = 3.26. Based on the provided information, the critical value for a significance level of α = 0.05 with 3 and 18 degrees of freedom (four levels minus one for the numerator and 24 minus four for the denominator) is 9.197. Since the obtained F0 is less than the critical value, the null hypothesis is retained. Therefore, there is no evidence to suggest a significant difference in variances at the 0.05 level.

To find bounds on the P-value, we look at standard F-distribution tables or use software to find the exact probability. However, since F0 < F(0.05, 3, 18), we know that the P-value must be greater than 0.05, giving us a lower bound. An upper bound is more challenging to state without additional tables or software but is less than 1.0 as a P-value cannot exceed this.

To set up the iterated integrals for a given region, we need to find the limits of integration for both x and y. In this case, the region D is bounded by y = x - 42 and x = y^2. By visualizing the region, we can determine the limits of integration for both orders of integration. We can then choose the easier order to evaluate the double integral.

To set up the iterated integrals, we need to find the limits of integration for both x and y. First, let's visualize the region D bounded by y = x - 42 and x = y^2. The curve y = x - 42 intersects the parabola x = y^2 at two points: (7, -35) and (-7, -49).

To set up the iterated integral with dx dy order, the outer integral will have limits of integration for y that go from -49 to -35. The inner integral will have limits of integration for x that go from the parabola x = y^2 to the line x = y + 42.

The iterated integral with dy dx order can be set up by reversing the order of integration. The outer integral will have limits of integration for x that go from -7 to 7, and the inner integral will have limits of integration for y that go from the line y = x - 42 to the parabola y = sqrt(x).

To evaluate the double integral using the easier order, we can choose either order and find the corresponding iterated integral.

Let's choose the dy dx order. The limits of integration for the outer integral are x = -7 to x = 7, and for each x, the limits of integration for the inner integral are y = x - 42 to y = sqrt(x).

Now, we can evaluate the double integral.

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Answer:

b.  

About 44% of the variation in the final exam score can be explained by the students' scores on the 3rd exam. The remaining 56% is due to other factors or unexplained randomness.

Step-by-step explanation:

Hello!

X: Third exam score of a statistics student.

Y: Final exam score of a statistics student.

The estimated regression line is: y = -173.51 + 4.83x

Where

-173.51 is the estimation of the intercept and you can interpret it as the value of the estimated average final exam score when the students scored 0 points on their third exam.

4.83 is the estimation of the slope and you can interpret is as the modification on the estimated average score of the final exam every time the score on the third exam increases 1 point.

R²= represents the coefficient of determination.

Its interpretation is: 44% of the variability of the final exam scores of the statistics students are explained by the scores in the third exam, under the estimated model y = -173.51 + 4.83x.

I hope it helps!

-*-

A random sample of 11 statistics students produced data where x is the third exam score out of 80, and y is the final exam score out of 200. The corresponding regression line has the equation: y = -173.51 + 4.83x, and the value of r2 (the "coefficient of determination") is found to be 0.44. What is the proper interpretation of r2?

a.  

Due to the number of points on the two exams, the third exam score will likely be 44% of the final exam score.

b.  

About 44% of the variation in the final exam score can be explained by the students' scores on the 3rd exam. The remaining 56% is due to other factors or unexplained randomness.

c.  

For each 1 point increase in the 3rd exam score, we expect the final exam score to increase by 0.44 points.

d.  

For each 1 point increase in the 3rd exam score, we expect the final exam score to increase by 0.44 percent.

e.  

44% of the students scored within 1 standard deviation of the mean on each of the two tests.

The r² value of 0.44 indicates that approximately 44% of the variation in final exam scores can be explained by scores on the third exam, with the remaining variation due to other factors. Option b is the correct interpretation.

The coefficient of determination, denoted as r², explains the proportion of the variance in the dependent variable (y) that is predictable from the independent variable (x).

In this context, the r² value is 0.44, which means that approximately 44% of the variation in the final exam scores (y) can be explained by the variation in the third exam scores (x).

So, the correct interpretation of r² is given by option b: "About 44% of the variation in the final exam score can be explained by the students' scores on the 3rd exam. The remaining 56% is due to other factors or unexplained randomness."

Complete Question:

A random sample of 11 statistics students produced data where x is the third exam score out of 80, and y is the final exam score out of 200. The corresponding regression line has the equation: y = -173.51 + 4.83x, and the value of r2 (the "coefficient of determination") is found to be 0.44. What is the proper interpretation of r2?

a.  Due to the number of points on the two exams, the third exam score will likely be 44% of the final exam score.

b.  About 44% of the variation in the final exam score can be explained by the students' scores on the 3rd exam. The remaining 56% is due to other factors or unexplained randomness.

c.  For each 1 point increase in the 3rd exam score, we expect the final exam score to increase by 0.44 points.

d.  For each 1 point increase in the 3rd exam score, we expect the final exam score to increase by 0.44 percent.

e.  44% of the students scored within 1 standard deviation of the mean on each of the two tests.

Complete Question

"We might think that a ball that is dropped from a height of 15 feet and rebounds to a height 7/8 of its previous height at each bounce keeps bouncing forever since it takes infinitely many bounces. This is not true! We examine this idea in this problem.

Show that a ball dropped from a height h feet reaches the floor in 1/4√h seconds. Then use this result to find the time, in seconds, the ball has been bouncing when it hits the floor for the first, second, third and fourth times:

Answer:

t = ¼√h seconds

Step-by-step explanation:

Given

Height = 15 feet

Show that a ball dropped from a height h feet reaches the floor in 14h−−√ seconds. Then use this result to find the time, in seconds, the ball has been bouncing when it hits the floor for the first, second, third and fourth times:

From this, we understand that

u = Initial Velocity = 0

a = g = acceleration due to gravity = 9.8m/s² = 32ft/s²

h = initial height = 15

Using Newton equation of motion

h = ut + ½at²

Substitute the values

15 = 0 * t + ½ * 32 t²

15 = 16t² ---- make t² the subject of formula

t² = 15/16 ----- square root both sides

t = √15/√16

t = ¼√15

But h = 15

So, t = ¼√h seconds

Or t = 0.25√h seconds

-- Proved

Final answer:

A ball dropped from a height h feet reaches the floor in 14h−−√ seconds. To find the time the ball bounces when it hits the floor for the first, second, third, and fourth times, we can use this result. For example, if h = 1.5 meters, the time it takes for the ball to bounce for the first, second, third, and fourth times would be approximately 6.93 seconds, 7.95 seconds, 8.96 seconds, and 9.98 seconds, respectively.

Explanation:

Given that a ball dropped from a height h feet reaches the floor in 14h√ seconds, we can use this result to find the time the ball bounces when it hits the floor for the first, second, third, and fourth times.

Let's say the time it takes for the ball to reach the floor for the first time is t1. Using the equation 14h√ = t1, we can solve for t1 by squaring both sides of the equation and solving for t1. Similarly, we can find the time for the second, third, and fourth bounces.

For example, if h = 1.5 meters, the time it takes for the ball to bounce for the first, second, third, and fourth times would be approximately 6.93 seconds, 7.95 seconds, 8.96 seconds, and 9.98 seconds, respectively.

Answer: the monthly payment is $379.1

Step-by-step explanation:

The balance to be paid would be

7300 - 1000 = $6300

We would apply the periodic interest rate formula which is expressed as

P = a/[{(1+r)^n]-1}/{r(1+r)^n}]

Where

P represents the monthly payments.

a represents the amount to be paid

r represents the annual rate.

n represents number of monthly payments. Therefore

a = $6300

r = 0.1/12 = 0.0083

n = 12 × 1.5 = 18

Therefore,

P = 6300/[{(1+0.0083)^18]-1}/{0.0083(1+0.0083)^18}]

6300/[{(1.0083)^18]-1}/{0.0083(1.0083)^36}]

P = 6300/{1.16 -1}/[0.0083(1.16)]

P = 6300/(0.16/0.009628)

P = 6300/16.618

P = $379.1

Final answer:

The Giordanos will have to pay $385 every month for 18 months to fully pay off the furniture with the 10% add-on interest taken into account.

Explanation:

To calculate the monthly payment for the furniture bought by the Giordanos, we'll start by subtracting the down payment from the total cost to find the amount that will be subject to interest. The total cost of the furniture is $7,300 and they paid $1,000 down, leaving $6,300 to be financed.

With a 10% add-on interest, the total interest would be 10% of $6,300, which is $630. Therefore, the total amount to be repaid is the financed amount plus the interest, which is $6,300 + $630 = $6,930.

The Giordanos plan to pay off this amount in 18 monthly payments. Dividing the total amount by 18 gives us the monthly payment.

Monthly Payment Calculation:

Total amount to be repaid: $6,930
Number of monthly payments: 18
Monthly payment: $6,930 ÷ 18 = $385

The Giordanos will have to pay $385 every month for 18 months to fully pay off the furniture.

Answer:

The answer to the given problem is given below.

Step-by-step explanation:

What values do p, q,n,E and p represents?

The value of p is the sample proportion.

The value of q is found from evaluating 1− p.

The value of n is the sample size.

The value of E is the margin of error.

The value of p is the population proportion.

If the confidence level is 90%, what is the value of α?

α = 1- 0.90

α = 0.10

COMPLETE QUESTION:

What is the expected number of schools of fish found in one day of searching?

Answer: 0.1

Step-by-step explanation:

One school of fish per 100,000 square miles of ocean

Plane can search 10,000 square miles

Therefore,

Expected number of schools of fish found in one day of searching

= 10,000 / 100,000

= 0.1

Answer:

Decrease the width of the confidence interval

Step-by-step explanation:

Sample size is in the denominator, so increasing n would decrease the width for the same level of confidence

Final answer:

Increasing the sample size will decrease the width of the confidence interval and decrease the standard error, leading to a more precise estimate of the population mean with the same level of confidence.

Explanation:

If all other factors are held constant, increasing the sample size will decrease the width of the confidence interval. This is because a larger sample size reduces the variability within the sample. The standard error, which is inversely proportional to the square root of the sample size, will also decrease as a result. Thus, we do not need as wide an interval to capture the true population mean with the same level of confidence when the sample size is larger.

Another related concept is that as the confidence level increases, the error bound increases, making the confidence interval wider. However, this effect is separate from changes in the sample size. Also, it's important to note that the standard deviation of the sampling distribution of the means will decrease as the sample size increases, leading to a more precise estimate of the population mean. Therefore, increasing the sample size, while keeping the confidence level constant, leaves us more confident about our estimate being closer to the true population mean.

Answer:

You would prefer a z-score of 2, because the higher the z-score, the higher your grade was relative to your classmates.

Step-by-step explanation:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

For example

If the z-score of your grade was -2, it means that your grade was 2 standard deviations below the average grade.

Otherwise, if the z-score of your grade was 2, it means that your grade was 2 standard deviations above the average higher.

The higher the z-score, the better.

So you would prefer a z-score of 2, because the higher the z-score, the higher your grade was relative to your classmates.

Answer: it cost $50.94 to fill an 18 gallon tank.

Step-by-step explanation:

Julio filled his gas tank with 6 gallons of premium unleaded gas for $16.98. This means that amount it cost to will fill his gas tank with 1 gallon of premium unleaded gas would be

16.98/6 = $2.83 per gallon

Therefore, the amount of will cost to an 18 gallon tank with premium unleaded gas would be

18 × 2.83 = $50.94

Answer:

$1166.08 is the monthly payment for the mortgage per month.

Step-by-step explanation:

The meaning of this stated formula on the statement is the present annuity formula because we will have future monthly payments on the mortgage of the house in which they pay off the present value of the house which is $240000 x 80% = $ 192000 as this amount will excludes the down payment of 20% that is made.

We are given Pv the present value which excludes the down payment  $192000.

We have the interest rate i which is 1.2%/12 as it is compounded monthly.

n is the number of payments made over a period which is 12 x 15 years= 180 payments as it is compounded monthly.

no we substitute the above mentioned information to the present value annuity formula stated to calculate R the monthly payment:

Pv = R[(1-(1+i)^-n)/i]

$192000 = R[(1-(1+(1.2%/12))^-180)/ (1.2%/12)] divide both sides by the coefficient of R

$192000/[(1-(1+(1.2%/12))^-180)/(1.2%/12)] = R

$1166.08 =R which this is the amount that will be paid for the mortgage every month for 15 years.

Final answer:

The probability of the sample average pH being less than 8.47, given a mean of 8.5 and a standard deviation of 0.22, is approximately 44.55%, as calculated using the Z-score and the standard normal distribution.

Explanation:

To determine the probability that the sample average pH is less than 8.47, when the average pH of the reservoir is 8.5 and the standard deviation is 0.22, we can use the concepts of the normal distribution and Z-scores in statistics. A Z-score is a measure of how many standard deviations an element is from the mean. First, we calculate the Z-score for pH 8.47 using the formula:

Z = (X - μ) / σ

Where X is the value of interest (8.47), μ is the mean pH (8.5), and σ is the standard deviation (0.22). Plugging in the numbers:

Z = (8.47 - 8.5) / 0.22 = -0.03 / 0.22 ≈ -0.1364

With a Z-score of approximately -0.1364, we can then consult the standard normal distribution table to find the probability corresponding to this Z-score. The probability associated with a Z-score of -0.1364 is about 0.4455, meaning there is a 44.55% chance that a sample average pH would be less than 8.47, assuming the pH levels are normally distributed.

Answer:

Step-by-step explanation:

Hello!

1) The objective is to evaluate the depth perception of pilots over the age of fifty.

To do so a sample of n=14 airline pilots over the age of fifty was taken, each of them was asked to judge the distance between two markers placed 20 feet apart, the pilot's error in judging the distance was recorded:

2.9, 2.6, 2.9, 2.6, 2.4, 1.3, 2.3, 2.2, 2.5, 2.3, 2.8, 2.5, 2.7, 2.6

Then the variable of interest is X: error in judging the distance between two markers placed 20 feet apart of one pilot. (feet)

Assuming that this variable has a normal distribution, with a standard deviation of σ= 1.4 feet

The hypothesis is that the mean error in-depth perception for the company's pilots over the age of fifty is greater than 2.1, symbolically: μ > 2.1

H₀: μ ≤ 2.1

H₁: μ > 2.1

α: 0.05

Since the variable has a normal distribution and the population standard deviation is known, the statistic to use for this test is the standard normal:

[tex]Z= \frac{X[bar]-Mu}{\frac{Sigma}{\sqrt{n} } } ~~N(0;1)[/tex]

The sample mean is

X[bar]= ∑X/n= 34.90/14= 2.49

[tex]Z_{H_0}= \frac{2.49-2.1}{\frac{1.4}{\sqrt{14} } } = 1.04[/tex]

The p-value for this test is 0.14917

Using the p-value approach, since it is greater than the significance level, the decision is to not reject the null hypothesis.

Then there is no evidence that the mean error in-depth perception for the company's pilots over the age of fifty is greater than 2.1 feet.

2) To construct the 90% confidence interval you have to use the same distribution as before, the formula for the interval under the standard deviation is:

[X[bar] ± [tex]Z_{1-\alpha /2}[/tex] * (δ/√n)]

[tex]Z_{1-\alpha /2}= Z_{0.95}= 1.645[/tex]

[2.49 ± 1.645 * (1.4/√14)]

[1.87; 3.11]

With a 90% confidence, you'd expect that the true mean of the error in-depth perception of the airline's pilots over fifty years old is contained in the interval [1.87; 3.11].

I hope you have a SUPER day!

The One-Sample T Test can be used to determine whether the mean error in depth perception for pilots over the age of fifty is greater than 2.1. The p-value from this test can inform whether to reject the null hypothesis. The 90% confidence interval can be determined by calculating the standard error and using a t-value associated with a 90% confidence level, the obtained margin of error is subtracted and added to the mean to generate the confidence interval.

The subject of the question is statistical testing, specifically One-Sample T Test and Confidence Interval computing. The goal is to determine whether the mean error in depth perception of pilots over the age of fifty is greater than 2.1 and to calculate the 90% confidence interval for the mean error in depth perception.

To perform this test, one would organize the provided data set in a software like R or Excel, compute the sample mean and use the One-Sample T Test function to compare the sample mean to the hypothesized mean of 2.1. The null hypothesis would be that the mean error is not greater than 2.1, and the alternative hypothesis is that the mean error is greater than 2.1. If the p-value received from the One-Sample T Test is less than 0.05, we reject the null hypothesis and conclude that the mean error is greater than 2.1.

As for the 90% Confidence Interval, it is done in statistical software by calculating the standard error, which accounts for both the standard deviation and the sample size, and multiplying it by the relevant t-value (associated with a 90% confidence level and degrees of freedom which equals sample size minus 1). This result then serves as the margin of error which is subtracted and added to the mean to generate the confidence interval.

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The LCLR is approximately 14.5148.

We have,

To calculate the lower control limit (LCLR) for the range in a control chart, we use the formula:

LCLR = D3 * Average Range

Given the sample ranges of the last 5 samples:

9, 14, 8, 7, and 5, we can calculate the average range:

Average Range = (9 + 14 + 8 + 7 + 5) / 5 = 8.6

The D3 value for a sample size of 8 is typically 1.693.

The lower control limit (LCLR) for the range.

LCLR = D3 * Average Range

= 1.693 * 8.6 = 14.5148

(rounded to four decimal places)

Thus,

The LCLR is approximately 14.5148.

Learn more about control charts here:

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To find LCLR, calculate the average range of the samples and subtract a constant (d2) from it. In this case, LCLR = 53.977 grams.

In this question, we are given the results from the last 5 samples of the weight of packets from the box-filling line. The process average weight per packet is 127 grams. We are asked to find the Lower Control Limit for Range (LCLR) to check if the process is in control. To find LCLR, we need to calculate the average range of the samples and subtract a constant (d2) from it.

First, we calculate the average range of the samples by summing the ranges and dividing by the number of samples. In this case, the sum of the ranges is 92 + 83 + 14 + 85 + 7 = 281. So, the average range is 281 / 5 = 56.2.

Next, we need to find the value of d2, which depends on the sample size. In this case, the sample size is 8. Looking up the value of d2 for a sample sisizeze of 8 in the control chart constants table, we find that it is 2.223. Finally, we can calculate LCLR by subtracting 2.223 from the average range: LCLR = 56.2 - 2.223 = 53.977 grams.

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Answer:

a.) w = 103 * 1.08^t

b.) 3.5weeks

Step-by-step explanation:

If Her current weight is 103 pounds and she hopes to multiply her her weight each week by 1.08, then

her weight after 1 week = 103 * 1.08 = 103 * 1.08¹

Her weight after 2 weeks = [weight of week 1] * 1.08 = [103* 1.08] * 1.08 = 103 * 1.08²

Weight after 3 weeks= [weight of week 2] * 1.08 = [103 * 1.08 * 1.08] * 1.08 = 103 * 1.08³

Hence weight (W) after t weeks = 103 * 1.08^t

b.) If W = 135, Then

103 * 1.08^t = 135

1.08^t = 135/103

1.08^t = 1.31

Taking log of both sides,

log 1.08^t = log 1.31

t log 1.08 = log 1.32

t = log 1.32/log 1.08

t = 3.5 weeks.

Hence, it will take her 3½ weeks to get to 135pounds weight.

Answer: a. 0.159

b. 0.841

C. 0.17

d. 0.034

e. 0.2133

F. 0.501

Step-by-step explanation:

You will bike 30.2 miles in the seventh day according to the prediction.

Here we have the following data, You bike

So we can know some facts:

[tex]5.4-5=0.4mi[/tex]

[tex]6.2-5.4=0.8mi[/tex]

[tex]7.8-6.2=1.6mi[/tex]

By taking a look at the pattern, we can see that each day you increases the number of miles by a factor of 2 compared to the previous day. So:

[tex]x_{5}-7.8=3.2mi \\ \\ x_{5}=7.8+3.2=11mi, \ \text{Day 5}[/tex]

[tex]x_{6}-11=6.4mi \\ \\ x_{6}=6.4+11=17.4mi, \ \text{Day 6}[/tex]

Finally:

[tex]x_{7}-17.4=12.8mi \\ \\ x_{7}=12.8+17.4=30.2mi, \ \text{Day 7}[/tex]

By noting the pattern that the daily increase doubles each time, we can predict that the total distance biked on the seventh day would be 30.2 miles.

To predict the number of miles biked on the seventh day, we need to first determine the pattern in the increase of biking distances over the days given. The distances biked in the consecutive days are: 5, 5.4, 6.2, and 7.8 miles. We can see that each day, the distance increases at varying amounts:

The increase pattern appears to be that each day the distance increases by double the amount of the previous day. Therefore, we can predict the increase and the total distance for the next days:

If the pattern continues, the student would bike 30.2 miles on the seventh day.

Answer:

Step-by-step explanation:

Given that events A1, A2 and A3 form a partiton of the sample space S with probabilities P(A1) = 0.3, P(A2) = 0.5, P(A3) = 0.2.

i.e. A1, A2, and A3 are mutually exclusive and exhaustive

E is an event such that

P(E|A1) = 0.1, P(E|A2) = 0.6, P(E|A3) = 0.8,

[tex]P(E) = P(A_1E)+P(A_2E)+P(A_3E)\\= \Sigma P(E/A_1) P(A_1) \\= 0.1(0.3)+0.5(0.6)+0.8(0.2)\\= 0.03+0.3+0.16\\= 0.49[/tex]

[tex]P(A_1/E) = P(A_1E)/P(E) = \frac{0.3(0.1)}{0.49} \\=0.061224[/tex]

[tex]P(A_2/E) = P(A_2E)/P(E) = \frac{0.5)(0.6)}{0.49} \\=0.61224[/tex]

[tex]P(A_3/E) = P(A_3E)/P(E) = \frac{0.2)(0.8)}{0.49} \\=0.3265[/tex]

The probability of event E is 0.49. The probability of event A1 given E is approximately 0.0612. The probability of event A2 given E is approximately 0.6122. The probability of event A3 given E is approximately 0.3265.

Probability of event E:

P(E) = P(E|A1) * P(A1) + P(E|A2) * P(A2) + P(E|A3) * P(A3)

P(E) = 0.1 * 0.3 + 0.6 * 0.5 + 0.8 * 0.2 = 0.03 + 0.3 + 0.16 = 0.49

Probability of event A1 given E:

P(A1|E) = [P(E|A1) * P(A1)] / P(E) = (0.1 * 0.3) / 0.49 = 0.03 / 0.49 ≈ 0.0612

Probability of event A2 given E:

P(A2|E) = [P(E|A2) * P(A2)] / P(E) = (0.6 * 0.5) / 0.49 = 0.3 / 0.49 ≈ 0.6122

Probability of event A3 given E:

P(A3|E) = [P(E|A3) * P(A3)] / P(E) = (0.8 * 0.2) / 0.49 = 0.16 / 0.49 ≈ 0.3265

Answer:

0.0082 or 0.82%

Step-by-step explanation:

Given:

Mean of jump time (μ) = 45 s

Standard deviation (σ) = 5 s

Time for jump required for accomplishment (x) = 33 s

The distribution is normal distribution.

So, first, we will find the z-score of the distribution using the formula:

[tex]z=\frac{x-\mu}{\sigma}[/tex]

Plug in the values and solve for 'z'. This gives,

[tex]z=\frac{33-45}{5}=-2.4[/tex]

So, the z-score of the distribution is -2.4.

Now, we need the probability [tex]P(x\leq 33)=P(z\leq -2.4)[/tex].

From the normal distribution table for z-score equal to -2.4, the value of the probability is 0.0082 or 0.82%.

Therefore, the probability of making a jump in 33 seconds or less is 0.0082 or 0.82%.

Using the normal distribution, it is found that there is a 0.0082 = 0.82% probability of such an accomplishment.

In a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

In this problem:

The probability is the p-value of Z when X = 33, hence:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{33 - 45}{5}[/tex]

[tex]Z = -2.4[/tex]

[tex]Z = -2.4[/tex] has a p-value of 0.0082.

0.0082 = 0.82% probability of such an accomplishment.

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Answer:

[tex]3\sqrt{t} +\frac{2}{\sqrt{t}}[/tex] square inches per seconds.

Step-by-step explanation:

given that a rectangle is growing such that the length of a rectangle is 5t+4 and its height is √t, where t is time in seconds and the dimensions are in inches

Area of rectangle = length * width

A = [tex]\sqrt{t} (5t+4)\\= 5t\sqrt{t} +4\sqrt{t}[/tex]

To find rate of change of A with respect to t, we can find derivative of A with respect to t.

WE get

[tex]\frac{dA}{dt} =5(\frac{3}{2} )\sqrt{t} +\frac{4}{2\sqrt{t} } \\= 3\sqrt{t} +\frac{2}{\sqrt{t}}[/tex]

Hence rate of change of area with respect to time is

[tex]3\sqrt{t} +\frac{2}{\sqrt{t}}[/tex] square inches per seconds.