Question
11. The following table shows the class size and the average test score Class Size 15...
11. The following table shows the class size and the average
test score
| Class Size | 15 | 17 | 18 | 20 | 21 | 24 | 26 | 29 |
| Average Test score | 85 | 86 | 85 | 82 | 80 | 78 | 75 | 72 |
Calculate:
Coefficient of correlation ( r )
Coefficient of determination (r2)
Slope of the regression line
Intercept of the regression line
Equation of the regression line
Predicted value of test score for class size = 22
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