Question: (Continuation of Problem 8.5.) Fit a regression plane for CESD on INCOME and AGE for males and females combined. Test whether the regression plane is
(Continuation of Problem 8.5.) Fit a regression plane for CESD on INCOME and AGE for males and females combined. Test whether the regression plane is helpful in predicting the values of CESD. Find a 95% prediction interval for a female with INCOME = 17 and AGE
= 29 using this regression. Do the same using the regression calculated in Problem 8.5, and compare.
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