When a multiple regression model is used for estimatingthe

Chapter 12, Problem 133SE

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QUESTION:

When a multiple regression model is used for estimating the mean of the dependent variable and for predicting a new value of y, which will be narrower—the confidence interval for the mean or the prediction interval for the new y value? Why?

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QUESTION:

When a multiple regression model is used for estimating the mean of the dependent variable and for predicting a new value of y, which will be narrower—the confidence interval for the mean or the prediction interval for the new y value? Why?

ANSWER:

Step 1 of 1

The confidence interval for the mean E(y) is narrower than the prediction interval for

y because of the additional uncerta

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