two owners of a cattle ranch, Jo and Val, want to find the average weight for the ranch’s 200 cows. Instead of weighing all of the cows:
Jo weighs 25 cows and gets an average weight of 1,350 pounds (stdev 50)
Val weighs 100 cows and gets an average weight of 1,420 pounds (stdev 50)
What is Jo’s margin of error, rounded to the nearest whole number? (The formula is
10
20
50
529
Answers
Answer:
Required margin of error = 20
Step-by-step explanation:
Required margin of error = 20
so , option (2) is the correct answer.
Explanation:
Values are given as,
we will have to need confidence level to calculate margin of error so ,we assume 95% confidence level .
z = 1.96 (critical value of 95%)
sample size n = 25
standard deviation = 50
Using the formula
Margin of error E = z∗(σ/ n )
putting the values
1.96∗(50/ 25)
= 19.6
=20
Required margin of error : E = 20
Answer: Jo's margin of error is M = 20
Step-by-step explanation:
The margin of error can be calculated as:
M = z*σ/√n
where:
z depends on the confidence interval with we are working, let's use 95%, so z = 1.96
σ = standard deviation = 50
n = number of the sample.
So for Jo we have:
M = 1.96*50/√25 = 1.96*50/5 = 1.96*10 = 19.6
So if we round it to the nearest whole number, we should round up, and we get:
M = 20
Related Questions
Solve.
The cost of having a package delivered by Quick Bicycle
Delivery is a function of the weight of the package. The
graph of this function is shown
What does the slope
represent in the
function?
Cost of Delivery
25
Weight (lb)
Tell whether each statement is True or False.
a. When the weight is greater
than 15 pounds, the cost
will be greater than $10.
b. An equation that represents
this graph is y * +0.6.
c. The slope is 1
d. The cost of delivery decreases
by $0.60 for each pound the
weight decreases
o True
True
True
I False
False
False
True
False
Answers
Answer:
Step-by-step explanation:
true
true
false
true
true
false
true
false
Each marble bag sold by Karen's Marble Company contains 3 blue marbles for every 5 yellow marbles. If a bag has 45 yellow marbles, how many blue marbles
does it contain?
Answers
Answer:
27
Step-by-step explanation:
5/3 = 45/X
X = 27
Answer:
27 Blue marbles
Step-by-step explanation:
3 Blue marbles = 5 Yellow marbles
x = 45
(x multiply by 5) = 45 x 3
5x = 135
x = 135/5
x = 27 Blue Marbles
True or false? Explain.
If f = {(1, 1), (2, 4), (3, 9)}, then f(5)=25
the answer is false (online system) but i dont know why
pls help stuck on HW
Answers
What is the answer for -12+x/11=-3
Answers
Answer:
x = 99
Step-by-step explanation:
Step 1: Solve for x
-12 + x/11 + 12 = -3 + 12
x/11 * 11 = 9 * 11
x = 99
Answer: x = 99
The ratio of bananas to apples was 2 to 3. If there where 18 bananas how many apples where there
Answers
Answer:
There were 27 apples.
Step-by-step explanation:
Set a ratio of bananas to apples like this:
bananas/apples = 2/3
Now you have 18 bananas. The number of apples is unknown, so use "a" for the number of apples.
bananas/apples = 18/a
The two ratios above are equal, so set them equal. That creates a proportion.
2/3 = 18/a
Now we solve for a by cross multiplying.
2a = 3 * 18
2a = 54
a = 27
Answer: There were 27 apples.
The New York Times newspaper publishes one issue each day during the
year. What is the Order of Magnitude for the number of issues of the New
York Times published each year?
Answers
Answer:
The Order of Magnitude for the number of issues of the New York Times published each year is 2.
Step-by-step explanation:
Given that the newspaper publishes one issue each day and the year has 365 days, then it publishes 365 issues each year.
365 can be rewritten, with scientific notation, as: 3.65*10^2, which means it has 2 orders of magnitude (it is indicated in the exponent).
What is the answer?
Answers
Answer:
D
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
The path of a rotating fan has a diameter of about 18 inches and a circumference of about 56 inches. The path of a smaller model of the fan has a circumference of about 9 inches. What is the diameter of the rotating path of the smaller model? Round the nearest tenth.
Answers
Step-by-step explanation:
Proportionately the smaller diameter
18×9=162
162/56=2.89 inches
round it so it's approx 3 inches
(Copied and pasted because no time) EXTREMELY URGENT! I'm in a timed math test atm, and I need answers for lots of questions! Look at the pictures posted, ignore my answer, as I am not confident in it, I just dont have time to leave the questions blank
Answers
Answer: I think the answer is D too just saying cuz I’m not sure either
Step-by-step explanation:
While mining, Joan found a large metal bar that weighted 40 grams. Joan was able to determine that the bar contained 35% zinc. How many grams of zinc are in the metal bar? Round you answer to the nearest whole number if necessary.
Answers
Answer:
14g zinc
Step-by-step explanation:
To get the mass of zinc in the metal bar, you can multiply the percentage of zinc by the total mass.
40g x .35 = 14g zinc
The metal bar contains 14 g zinc in the 40 grams metal bar.
What are percentages?A percentage is a number or ratio that can be expressed as a fraction of 100. If we have to calculate the percent of a number, divide the number by the whole and multiply by 100. Hence, the percentage means, a part per hundred. The word percent means per 100. It is represented by the symbol “%”
Given here: A metal bar weighs 40 grams and it contains zinc equivalent to 35%
Let the weight of the zinc contained in the metal be x
Then we have x=35/100×40
=14 grams
Hence, The metal bar contains 14 g zinc in the 40 grams metal bar.
Learn more about percentages here:
https://brainly.com/question/29306119
#SPJ2
If y
per
wha
If you roll a number
cube 50 times, how
many times do you
expect to roll a
number less than 3?
seci
Answers
Answer:
8.333
Step-by-step explanation:
50 (times)/ 6 (amount of numbers possible on cube)
What is the answer for -2/5(n + 3) = 10?
Answers
Answer: n=-28
Step-by-step explanation:
Answer:
-28
Step-by-step explanation:
1) distribute "-2/5" to each term inside the parentheses:
-2/5(n+3)=10
-2/5n+-6/5=10
add "6/5" on both sides
-2/5n-6/5+6/5=10+6/5
-2/5n=50/5+6/5
-2/5n=56/5
divide both sides by "-2/5"
n=-28
hope this helps
Factor the expression completely.
20x-16
Answers
Answer:
4(5x-4)
Step-by-step explanation:
4 is the common factor of 20 and 16 so it will stay outside the bracket. The left out is 5, x and 4. this forms the expression above.
Consider the triangle. Right triangle A B C. Side A C is 24 centimeters, C B is 10 centimeters, and hypotenuse A B is c. Find the length of the hypotenuse, c. The length of the hypotenuse is cm.
Answers
Answer: The length of the hypotenuse is 26 cm
Step-by-step explanation: Please refer to the attached diagram
The triangle ABC is drawn as described such that the right angle is at point C and line AB is the hypotenuse which is yet unknown.
Since we have a right angled triangle with two sides known and one unknown, we can apply the Pythagoras theorem which states that
AC² = AB² + BC² where AC is the hypotenuse and AB and BC are the other two sides
In this question the hypotenuse is AB, so we now have;
AB² = AC² + CB²
AB² 24² + 10²
AB² = 576 + 100
AB² = 676
Add the square root sign to both sides of the equation
√AB² = √676
AB = 26
Therefore the length of the hypotenuse is 26 cm
Answer:
26 cm is the answer
Step-by-step explanation:
i got the question right
What is the 15th term in the sequence using the given formula?
yn = 12n-1
Answers
Answer:
Step-by-step explanation:
hello :
yn = 12n-1
the 15th term is :y15 when x= 15
y15 = 12(15)-1
y15 = 179
Wut is circumference
Answers
The length of the outer edge of a circle
Answer:
Circumference is the distance around the outside of a circle
Step-by-step explanation:
To make dough, Reba needs 2 1/2 cups of flour. How much flour does she need to make 5 batches of dough?
Answers
Answer:
12 1/2 cups of flour
Step-by-step explanation:
2 1/2 cups for each batch
5 batches
2 1 /2 x 5 =
12 1 /2
Explanation: 2 1/2 multiplied by 5 is 12.5
8. A company sells concrete in batches of 5 cubic yards. The probability distribution of X, the number of cubic
yards sold in a single order for concrete from this company, is shown in the table below.
|
X = the number of cubic yards
Probability
10
10.15
15
0.25
20
0.25
25
0.30
30
0.05
The expected value of the probability distribution of X is 19.25 and the standard deviation is 5.76. There
is a fixed cost to deliver the concrete. The profit Y, in dollars, for a particular order can be described by
Y = 75X - 100. What is the standard deviation of Y?
(A) $332.00
(B) $432.00
(C) $532.00
(D) $1,343.75
(E) $1,400.00
Answers
Answer:
$432
Step-by-step explanation:
75(5.76)=432
The standard deviation of Y is $432 and this can be determined by using the formula of standard deviation and the given data.
Given :
A company sells concrete in batches of 5 cubic yards. The probability distribution of X, the number of cubic yards sold in a single order for concrete from this company, is shown in the table below.The expected value of the probability distribution of X is 19.25 and the standard deviation is 5.76. There is a fixed cost to deliver the concrete. The profit Y, in dollars, for a particular order can be described by (Y = 75X - 100).The formula to obtain the standard deviation is given below:
SD(Y) = SD(75X - 100)
Simplify the above expression by substituting the value of SD(X) and SD(100) in the above expression.
SD(Y) = 75SD(X) - SD(100)
SD(Y) = 75 SD(X) - 0
SD(Y) = 75 [tex]\times[/tex] 5.76
SD(Y) = $432
Therefore, the correct option is B).
For more information, refer to the link given below:
https://brainly.com/question/12402189
Which is a correct classification for the triangle?
equiangular triangle
acute triangle
right triangle
obtuse triangle
Answers
Answer:
acute
Step-by-step explanation:
If the distance from a plane to a radar station is 160 miles and the angle of depression is 34 degrees, find the number of ground miles from a point directly below the plane to the radar station.
Answers
Answer:
194
Step-by-step explanation:
Final answer:
To find the ground miles from a point below the plane to the radar station given the distance and angle of depression, use trigonometry to calculate the ground distance, which is approximately 107.2 miles.
Explanation:
The number of ground miles from a point directly below the plane to the radar station can be found using trigonometry. Given the distance from the plane to the radar station (160 miles) and the angle of depression (34 degrees), we can use the tangent function.
Calculate the distance on the ground using the formula: Ground distance = 160 x tan(34°).
Ground distance = 160 x tan(34°) ≈ 160 x 0.67 = 107.2 miles.
If KC = 31, what is KN?
Answers
Answer:
If KC = 31 then KN = 33
Step-by-step explanation:
includes the points (-6 , n) and (-8, -9) has a slope of 4 what is the value of n?
Answers
Step-by-step explanation:
[tex]slope \: = \frac{n - ( - 9)}{ - 6 - ( - 8)} \\ \\ \therefore \: 4 \: = \frac{n + 9}{ - 6 + 8} \\ \\ \therefore \: 4 \: = \frac{n + 9}{ 2} \\ \\ \therefore \: 4 \times 2= n + 9 \\ \\ \therefore 8= n + 9 \\ \\ \therefore \: n = 8 - 9 \\ \\ \huge \red{ \boxed{\therefore \: n = - 1}}[/tex]
An automobile factory,1849 parts are made in 4 hours.what is the average rate at which parts are made per hour?
Answers
Answer:
There are 462.25 parts being made per hour
Step-by-step explanation:
Step 1: Make an equation
An automobile factory, 1849 parts are made in 4 hours.
1849 / 4 = x
Step 2: Solve
1849 / 4 = x
462.25 = x
Answer: There are 462.25 parts being made per hour
To find the hourly rate the parts are made, just divide.
1,849 / 4 = 462.25 parts made per hour.
Best of Luck!
A catapult is designed to launch circus performers from a raised platform. After launch, the height of the performer in feet is given by h left parenthesis t right parenthesis equals minus 16 t squared plus 80 t plus 32 where t is seconds after launch. After how many seconds is the performer exactly 100 feet above the ground? Round to the nearest tenth of a second.
Answers
Answer:
t = 1.1 sec for first time and then in
t = 3.9 sec
Step-by-step explanation:
The function for the height of the circus performers is:
[tex]h(t) = -16t^{2} +80t +32[/tex]
where t is seconds after launch
h is height in feet
For calculating after how many seconds is the performer at 100 feet above the ground, we must equal the equation to 100 and to find t:
Then,
[tex]100 = -16t^{2} +80t+32[/tex]
[tex]0 = -16t^{2}+80t -68[/tex]
[tex]t = \frac{-80\ \pm \\\sqrt{80^{2}-4(-16)(-68) } }{2(-16)}[/tex]
t = 3.9 sec
t = 1.1 sec
Simplify the expression
6x^2+20/4
Answers
Answer:
6x2+5
Step-by-step explanation:
Darla and her friend penny left their office at the same time and began traveling down the same road in the same direction. Darla traveled at a speed of 65 mph while Penny drive at 70 mph. How many hours was it before Penny was 5 miles ahead of Darla?
Answers
Answer:
The number of hours was it before Penny was 5 miles ahead of Darla is 1 hour.
Step-by-step explanation:
Given : Darla and her friend penny left their office at the same time and began traveling down the same road in the same direction. Darla traveled at a speed of 65 mph while Penny drive at 70 mph.
To find : How many hours was it before Penny was 5 miles ahead of Darla?
Solution :
The formula used - [tex]\text{Distance}=\text{Speed}\times \text{Time}[/tex]
Darla traveled at a speed of 65 mph.
Penny drive at 70 mph.
Let x be the number of hours taken by both.
Distance covered by Darla is [tex]d_1= 65\times x=65x[/tex]
Distance covered by Penny is [tex]d_2= 70\times x=70x[/tex]
According to given statement; Penny was 5 miles ahead of Darla
i.e. [tex]d_2-d_1=5[/tex]
[tex]70x-65x=5[/tex]
[tex]5x=5[/tex]
[tex]x=\frac{5}{5}[/tex]
[tex]x=1[/tex]
The number of hours was it before Penny was 5 miles ahead of Darla is 1 hour.
sandy has 56cents. she bought candy for 25cents how much money does she have left
Answers
Answer:
31 cents left
Step-by-step explanation:
56-25=31
Which equation is the inverse of y = x2 – 36?
O y=+√x+6
y=1\x+36
2 y=+ X + 36
y=+Vx2+36
Answers
Answer:
y=1\x+36
Step-by-step explanation:
Find x.
5x - 20
A x=90
B x=35
C x=14
D x= 22
Answers
5x-20=90
Add 20 to both sides.
5x=110
Divide by 5 on each side to isolate x.
x= 22
Select the most SPECIFIC name for this shape
O Square
O Rhombus
O
Rectangle
O Parallelogram
Answers
Explaination: