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

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Answer:

Meiosis

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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.

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O memory excellence abilities cannot be learned through training.
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You can train yourself to excel in memory

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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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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]

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[tex]A=lw[/tex]

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

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

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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

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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.

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Make changes to improve your writing: tighten up your writing with compound predicates, relative pronouns and subordinating conjunctions; Weed out unnecessary words; and check for confusing constructions, like missing punctuation, run-on sentences, and fragments.

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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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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.

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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.

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Answer:

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