(a) Test the hypotheses H0: 2 = 20 , H1: 2=20 for 20 = .2 at = .05 using the estimated LR model in

(a) Test the hypotheses H0: σ2 = σ20

, H1: σ2=σ20 for σ20

= .2 at α = .05 using the estimated LR model in Example 14.2.

(b) Using the estimated LR model in Example 14.2, derive the .95 two-sided CIs for the regression coefficients.

(c) Use the estimated regression in Example 14.2 to predict the price for a z2,n+1 200-

year-old antique clock.