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The scatterplot below shows the relationship between two random variables X and Y. 6 5 t 3 2 2 O 0 8 2 X 3 (a) Is the correlation a good metric for describing the relationship between X and Y for these data? Why or why not? (b) Regardless of your answer to part (a), suppose you calculated the sample correlation between X and Y and found that r = -0.15. Explain in one sentence what this means. (c) If, as noted in (b), r = -0.15 then what is the value of the correlation between 2X and 5Y?

The scatterplot below shows the relationship between two random variables X and Y. 6 5 t 3 2 2 O 0 8 2 X 3 (a) Is the correlation a good metric for describing the relationship between X and Y for these data? Why or why not? (b) Regardless of your answer to part (a), suppose you calculated the sample correlation between X and Y and found that r = -0.15. Explain in one sentence what this means. (c) If, as noted in (b), r = -0.15 then what is the value of the correlation between 2X and 5Y?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The scatterplot below shows the relationship between two random variables X and Y.

(d). Based on (b) draw your best approximation to the least squares regression line that fits the data above. Also, make a rough sketch of the corresponding residual plot.  (The sketches do not have to be beautiful but they have to covey the correct information.) --> Please solve only this question #D

(b) Regardless of your answer to part (a), suppose you calculated the sample correlation between X and Y and found that r = -0.15. Explain in one sentence what this means.

 

e Draw Insert * A (B Font V Design>> Tell me Paragraph T 4 5 6 3 A 2 Styles The scatterplot below shows the relationship between two random variables X and Y. V 0 0 00 Dictate 1 88 go 2 Share X Editor 0 0 3 O Editing Comments (a) Is the correlation a good metric for describing the relationship between X and Y for these data? Why or why not? (b) Regardless of your answer to part (a), suppose you calculated the sample correlation between X and Y and found that r = -0.15. Explain in one sentence what this means. (c) If, as noted in (b), r = -0.15 then what is the value of the correlation between 2X and 5Y?
Transcribed Image Text:e Draw Insert * A (B Font V Design>> Tell me Paragraph T 4 5 6 3 A 2 Styles The scatterplot below shows the relationship between two random variables X and Y. V 0 0 00 Dictate 1 88 go 2 Share X Editor 0 0 3 O Editing Comments (a) Is the correlation a good metric for describing the relationship between X and Y for these data? Why or why not? (b) Regardless of your answer to part (a), suppose you calculated the sample correlation between X and Y and found that r = -0.15. Explain in one sentence what this means. (c) If, as noted in (b), r = -0.15 then what is the value of the correlation between 2X and 5Y?
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