1. For the multiple regression equation obtained in Exercise 16.13, determine the approximate
a. 95% confidence interval for the mean crispness rat- ing of pies that are baked 5.0 minutes at 300 degrees.
b. 95% prediction interval for the crispness rating of a pie that is baked 5.0 minutes at 300 degrees.
2. What is the relationship between (a) the results of the hypothesis test examining whether b3 differs sig- nificantly from zero at the 0.02 level and (b) the 98% confidence interval for f33?
3. For the multiple regression equation obtained in Exercise 16.11:
a. At the 0.05 level, is the overall regression equation significant?
b. Use the 0.05 level in concluding whether each partial regression coefficient differs significantly from zero.
c. Interpret the results of the preceding tests in the context of the variables described in that exercise.
d. Construct a 95% confidence interval for each partial regression coefficient in the population regression equation.