Refer to Exercise 7.

a. Find a 95% confidence interval for the coefficient of Last FEV.

b. Find a 98% confidence interval for the coefficient of Height.

c. Can you conclude that β₂

d. Can you conclude that β₃ > 0.5? Perform the appropriate hypothesis test.

Refer to Exercise 7.

In a study of the lung function of children, the volume of air exhaled under force in one second is called FEV1. (FEV1 stands for forced expiratory volume in one second.) Measurements were made on a group of children each year for two years. A linear model was fit to predict this year??s FEV1 as a function of last year??s FEV1 (in liters), the child??s gender (0 = Male, 1 = Female), the child??s height (in m), and the ambient atmospheric pressure (in mm). The following MINITAB output presents the results of fitting the model

FEV, = Bo + B, Last FEV, + B2 Gender + B3 Height + B4 Pressure +