With reference to Exercise 11.2 on page 418, 1. evaluate s ; 2. construct a 95% confidence interval for ; 3. construct a 95%

With reference to Exercise 11.2 on page 418, 1. evaluate s ;

2. construct a 95% confidence interval for β ;

3. construct a 95% confidence interval for β .

2 1 1 2

0 1

Figure 11.12: Confidence and prediction intervals for the chemical oxygen demand reduction data; inside bands indicate the confidence limits for the mean responses and outside bands indicate the prediction limits for the future responses.