Please answer this question! thanks!

7.3. Refer to Brand preference Problem 6.5.

a. Obtain the analysis of variance table that decomposes the regression sum of squares into

extra sums of squares associated with X, and with X2 , given X,.

b. Test whether X2 can be dropped from the regression model given that XI is retained. Use

the F* test statistic and level of significance .01. State the alternatives, decision rule, and

conclusion. What is the P-value of the test?