b. Construct a 95% prediction interval of the tear rating for an individual bag of coffee when the plate gap is 0 — you used bag-sealing equipment predict hag data are stored

For Information: Problem 13.7

SOLUTION

(a) 4.2105 17.2895

(b) 3.8628 17.6372

(c) Part (b) provides an interval prediction for the individual response given a specific value of the independent variable, and part (a) provides an interval estimate for the mean value given a specific value of the independent variable. Since there is much more variation in predicting an individual value than in estimating a mean value, a prediction interval is wider than a confidence interval estimate holding everything else fixed.