The MINITAB output given in Figure 8.40 is based on fitting a simple linear regression model relating abdomen circumference (????) to chest circumference (????) using the data in the Body Fat data set (???? = 252). Use the information in Figure 8.40 to answer the following questions.

(a) Estimate the mean value of Abdomen when Chest=110 cm.

(b) Compute a 95% confidence interval for the mean abdomen circumference of an adult male with a chest circumference of 110 cm.

(c) Compute the prediction error for predicting the abdomen circumference of an adult male with a chest circumference of 110 cm.

(d) Compute a 95% prediction interval for the abdomen circumference of an adult male with chest circumference of 110 cm.