According to the computer output in Table 9:
(a) Predict the mean response when x = 3.
(b) Find a 90% confidence interval for the mean response when x = 3. You will need the additional information n = 25, = 1.793, and ˆ‘ (xi - )2 = 1.848.
(c) Find a 90% confidence interval for the mean response when x = 2. Interpret.
Table 9 Computer Output for Exercise 11.36

THE REGRESSION EQUATION IS Y-0.3380 831x PREDICTOR CONSTANT 0.3381 0.83099 STDEV 0-1579 0.08702 T-RATIo 2.14 9.55 0.043 0.000 s-o.12 08 R-SQ 79.9% . ANALYSIS OF VARIANCE SOURCE REGRESSION ERROR TOTAL DP 8S MS 1 1.3318 1.3318 91.20 0.000 23 24 1.6676 0-3359 0.0146