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The following variables X and Y are both ratio scores: Participant Y 1 3 21 4 8. 9. 4 2 5. 9. 8. 4 5. 8. 2 9. 4 10 51 a. Calculate the appropriate correlation coefficient. b. Determine the regression equation.

The following variables X and Y are both ratio scores: Participant Y 1 3 21 4 8. 9. 4 2 5. 9. 8. 4 5. 8. 2 9. 4 10 51 a. Calculate the appropriate correlation coefficient. b. Determine the regression equation.

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
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Questions  E , D,  F needs to be answered 

Q. 4 The following variables X and Y are both ratio scores: Participant 1 2. 3 3 4 8. 15. mimnumai 1 7 6. 7 8. 2 6. 10 a. Calculate the appropriate correlation coefficient. b. Determine the regression equation. c. Compute the standard error of the estimate. d. Assume, r for X-5 and X=7 are 4.87 and 7.21 respectively. If any of the predicted scores are not the actual scores the subjects obtained, by how much do you expect them to be wrong? How much smaller is this error (in d above) than if you used the mean of all scores to predict Y scores. e. f. What is your answer in e above called and why? 385 245
Transcribed Image Text:Q. 4 The following variables X and Y are both ratio scores: Participant 1 2. 3 3 4 8. 15. mimnumai 1 7 6. 7 8. 2 6. 10 a. Calculate the appropriate correlation coefficient. b. Determine the regression equation. c. Compute the standard error of the estimate. d. Assume, r for X-5 and X=7 are 4.87 and 7.21 respectively. If any of the predicted scores are not the actual scores the subjects obtained, by how much do you expect them to be wrong? How much smaller is this error (in d above) than if you used the mean of all scores to predict Y scores. e. f. What is your answer in e above called and why? 385 245
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