Calculate the sum of squared error for the mean sstotal-

Question

Data are provided here with descriptive statistics, a correlation coefficient, and a regression equation: r 0.426, Y^ = 219.974 + 186.595(X).

Using this information, compute the following estimates of prediction error:

a. Calculate the sum of squared error for the mean, SS_total.

b. Now, using the regression equation provided, calculate the sum of squared error for the regression equation, SS_error.

c. Using your work, calculate the proportionate reduction in error for these data.

d. Check that this calculation of r² equals the square of the correlation coefficient.