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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