Question

In Problem 12.4 on page 423, you used the percentage of alcohol to predict wine quality. The data are stored in VinhoVerde. For these data, SYX = 0.9369 and hi = 0.024934 when X = 10.
a. Construct a 95% confidence interval estimate of the mean wine quality rating for all wines that have 10% alcohol.
b. Construct a 95% prediction interval of the wine quality rating of an individual wine that has 10% alcohol.
c. Explain the difference in the results in (a) and (b).


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  • CreatedJuly 16, 2015
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