Refer to Exercise 11.35 and the SAS computer output shown here.
a. Identify the 95% confidence bands for E(y) when 4 ≤ x ≤ 7.
b. Identify the 95% prediction bands for y, 4 ≤ x ≤ 7.
c. Distinguish between the meaning of the confidence bands and prediction bands in parts (a) and (b).
REFERENCE:
11.35 : A chemist is interested in determining the weight loss y of a particular compound as a function of the amount of time the compound is exposed to the air. The data in the following table give the weight losses associated with n = 12 settings of the independent variable, exposure time.
a. Find the least-squares prediction equation for the model
b. Test and draw conclusions.
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