Refer to the simple linear regression of number of employees y and age x for fast-growing firms,

Exercises 9.21,9.29, and 9.41. The SAS printout of the analysis is reproduced on page 526.

a. A 95% prediction interval for y when x = 10 is shown at the bottom of the printout. Interpret this interval.

b. How would the width of a 95% confidence interval for E(y) when x = 10 compare to the interval, part a?

c. Would you recommend using the model to predict the number of employees at a firm that has been in business two years'? Explain.