Part I What are the two main aspects of correlation? In other words, what two main...

Part I

What are the two main aspects of correlation? In other words, what two main things does correlation tell us about two different variables?
What is the difference between a positive and negative linear correlation? Give an example of each.
If a correlation coefficient is strong and positive, what can we conclude?
What is r²?

Solutions

Expert Solution

What are the two main aspects of correlation? In other words, what two main things does correlation tell us about two different variables?

Ans: Correlation can tell us if the variables are positively or negatively related

Also how strongly are they related

2) What is the difference between a positive and negative linear correlation? Give an example of each.

Ans: positive : If two variables move in same direction, it is positive.

Like, if height increases weight also increases.

and negative linear correlation: If two variables move in different direction, it is negative

Like, if students play more video games, GPA score would be less

3) If a correlation coefficient is strong and positive, what can we conclude?

Ans: We can say variables are very strongly and linearly related

4) R^2

Ans: R-squared is a statistical measure of how close the data are to the fitted regression line. It is also known as the coefficient of determination,

orchestra answered 1 year ago

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