hours studied X^2 score on quiz Y^2 XY 1 1 3 9 3 2 4 5 25 10 3 9 7 49 21 5 25 9 81 45 sigmaX=11 sigmaX^2=39 sigmaY=24 sigmaY^2=164 sigmaXY=79 part a: 1.what is the predictor variable? 2. what is...
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hours studied X^2 score on quiz Y^2 XY 1 1 3 9 3 2 4 5 25 10 3 9 7 49 21 5 25 9 81 45
sigmaX=11 sigmaX^2=39 sigmaY=24 sigmaY^2=164sigmaXY=79
part a:
1.what is the predictor variable?
2. what is the criterion variable?
compute the Pearson correlation.
3. what is the covariance.
4 what is the standard deviation of the predictor variable.
5 what is the standard deviation of the criterion variable.
6 what is the Pearson's r value
7. what is the best interpretation of your Pearson correlationin Q6? A. as hours studied goes up there is a correspondingincrease in score on quiz. B. As hours studied goes up there is acorresponding decrease in score on quiz.
8. The strength of the above relationship is considered. A, weak b. moderate c. strong.
Part B. compute the regression equation.
9. what is the numeric value for the slope?
10. what is the y-intercept?
11. what is the regression equation?
12. predict the total number of points on the quiz for a personstudying 4 hours.
| hours studied | X^2 | score on quiz | Y^2 | XY | |
| 1 | 1 | 3 | 9 | 3 | |
| 2 | 4 | 5 | 25 | 10 | |
| 3 | 9 | 7 | 49 | 21 | |
| 5 | 25 | 9 | 81 | 45 |
sigmaX=11 sigmaX^2=39 sigmaY=24 sigmaY^2=164sigmaXY=79
part a:
1.what is the predictor variable?
2. what is the criterion variable?
compute the Pearson correlation.
3. what is the covariance.
4 what is the standard deviation of the predictor variable.
5 what is the standard deviation of the criterion variable.
6 what is the Pearson's r value
7. what is the best interpretation of your Pearson correlationin Q6? A. as hours studied goes up there is a correspondingincrease in score on quiz. B. As hours studied goes up there is acorresponding decrease in score on quiz.
8. The strength of the above relationship is considered. A, weak b. moderate c. strong.
Part B. compute the regression equation.
9. what is the numeric value for the slope?
10. what is the y-intercept?
11. what is the regression equation?
12. predict the total number of points on the quiz for a personstudying 4 hours.
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