A teacher collected information from a class of 25 students about the time, in hours, they spent studying the previous week and the time, in hours, they spent on the Internet the previous week. The value of the correlation coefficient between hours spent studying and hours spent on the Internet was −0.72. If the teacher changes the units of each variable from hours to minutes, what will be the value of the correlation coefficient between minutes studying and minutes spent on the Internet?

A. −43.2

B. −0.72

C. −0.012

D. 0.72

E. 60.72

Answers

Answer 1

Answer:

B. −0.72

Explanation:

The correlation coefficient is a measure of the linear association between two variables.

It is a dimensionless value bettween - 1 and +1. Hence, it does not depend on the units that are used to measure the data.

You can see the formula to calculate the correlation coefficient in the attached picture.

There you see that the numerator containts the sum of the differences of the values of the x-variable with its the mean, multiplied by the sum of the differences of the values of the y variable with its mean, while the denominator contains the square root of the product of the squares of the same differences, thus the units are canceled.

In conclusion, If the teacher changes the units of each variable from hours to minutes, the value of the correlation coefficient between minutes studying and minutes spent on the Internet will not change; it will continue being −0.72.

A Teacher Collected Information From A Class Of 25 Students About The Time, In Hours, They Spent Studying

Related Questions

2. Throughout most of his life, Jonah did not have a particularly strong memory. One day, though, he saw a TV show about the USA Memory Championship and was intrigued by the amount of random information
that people could memorize. Jonah bought a book on memory enhancement techniques and began training. Two years later, he entered a memory competition and won. Jonah's experience demonstrates that:
O memory achievement has nothing to do with inborn abilities
O memory excellence abilities cannot be learned through training.
O you can train yourself to excel in memory.
O an extremely strong memory depends on inbom ability.

Answers

You can train yourself to excel in memory

Jonah's experience demonstrates that C. you can train yourself to excel in memory.

How is the information illustrated?

From the information, Jonah did not have a particularly strong memory and later bought a book on memory enhancement techniques and began training.

Therefore, Jonah's experience demonstrates that you can train yourself to excel in memory.

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What material is most often used in carpeting?
What are two functions of carpeting?
In what room should you use the most expensive carpet in your home? Why?

Answers

Answer:

Most carpet is normal average carpet in your room or something, other carpets can be used as door pads and personally your living room carpet should be most expensive because guests see

Which type of cell division produces cells that are different from each other

Answers

Answer:

Meiosis

Explanation:

Interpret the attorney’s "rough answer," as Kafka gives it. What is conveyed by the attorney’s actions? Take into account Kafka’s description, "allowing his polished shoes to creak."

*Text is the Metamorphosis by Franz Kafka

Answers

In "The Metamorphosis," the attorney's "rough answer" and the description of his "polished shoes creaking" convey a sense of arrogance towards Gregor Samsas family.

The lawyer's attitude implies a lack of compassion or understanding for Gregor's predicament, and his well-groomed look can represent his disconnection from the hard reality that other people must endure. His shoes cre//aking suggests a purposeful, determined action that emphasizes his conceit and disregard for Gregor's situation.

Overall, the lawyer's acts highlight themes of alienation and loneliness that run throughout the writing and show a disregard for other people's pain.

The length of a rectangle is 3 less than twice the width. If the area of the rectangle is 50 square inches, choose the equation that could be used to solve for the dimensions.

Answers

Answer:

[tex]w(2w-3)=50[/tex]

Explanation:

Let the length of the rectangle be [tex]w[/tex] units.

We were given that the length is 3 less than twice the width.

This implies that: [tex]l=2w-3[/tex]

We have that the area of this rectangle is 50 square inches.

Recall that area of rectangle is given by:

[tex]A=lw[/tex]

[tex]\implies w(2w-3)=50[/tex]

Therefore the required equation is [tex]w(2w-3)=50[/tex]

1.4
Compare TWO ways how destructive relationships influence your
well-being as opposed to constructive relationships.
2 x 2
= 4

Answers

Answer:

Destructive relationships influence your well-being negatively in several ways. It could lead to depression and unhealthy eating habits. They also have the tendency to make you start feeling worthless and willingness to indulge in self deprecating behavior.

On the other hand, constructive relationships boost your self esteem and inculcate a happy and self appreciating attitude within yourself. It helps you see the bright side of the world and promotes a healthy appreciating behavior towards yourself and your surroundings.

Destructive relationships as opposed to constructive relations will:

Negatively affect your mental health.Will cause a retrogression of your progress.

Destructive relationships are those that are marked by conflicts and little or no positive attributes.

As opposed to constructive relationships that are uplifting, these relationships negatively affect a person's mental health. Time that would have been spent in productive engagements is spent in conflicts.

So, the above are effects of destructive relationships to a person's wellbeing.

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If you received prior job safety training, who provided that training? (1 point) A. School B. Work/employer C. Service organization D. Scouts or other club E. Other F. Not Applicable

Answers

Answer:

The correct answer is option B. Work/employer

Explanation:

If a person received a prior job safety training, it mans that the employer of that person provided him the training.Every job has a specific job description which comes with its own safety hazards. Each company knows how to prevent accidents from happening and making sure each employee follows the company's specific safety protocol.

Therefore it is the employing company who provides the pre job safety training.

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Answers

Answer:

Valkyries take the souls of people who died bravely in battle to valhalla

Explanation:

I am a mythology nerd

Answer:

As these names suggest, they had various functions. Their main duty was to select the slain warriors, who had fallen in battle or other combat, such as quest or killing dragon, etc. These slain warriors were known as the Einherjar (Einheriar), and were chosen to fight alongside with the Aesir gods at Ragnarok.

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OU A
Lound this assignment helpu

Answers

The answer about improving your writing skills is explained below.

Explanation:

When you are in you education career, or in your professional career, writing skills cannot be neglected. You continuously need to write things down, either in the form of assignments, articles, presentations, letters, agenda, minutes, reports, etc. So your writing skills must be fantastic. Following are some ways that would help you to improve your skills of writing:

Be concise and clear while writing anythingKeep the topic shortWatch your tone while writingBreak down the topic into paragraphsStay on the topic, don't move out of context, etc

If you correctly follow the above mentioned ways of writing something, then your writing skills will be improved in a short period of time.

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Any of the actions listed under “Writing and Rewriting” is acceptable. Your goal is to improve your writing and increase the chance that the reader will understand and accept your point of view. Possible answers include:

Write an interesting first paragraph that grabs your audience's attention or surprises them. (Start with a startling statement, begin with a quote, introduce your topic with a definition, or begin with an incident, an anecdote, or a personal experience.

Use the correct tone for your audience.

Use word bridges to connect your ideas.

Take time away from your writing if you need to, and then reread what you have written. Give yourself advice.

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