Example 3 in this section illustrated the procedure for finding a prediction interval for an individual value

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Example 3 in this section illustrated the procedure for finding a prediction interval for an individual value of y. When using a specific value x0 for predicting the mean of all values of y, the confidence interval is as follows:

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where

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The critical value t?/2 is found with n - 2 degrees of freedom. Use the pizza subway data from the Chapter Problem to find a 95% confidence interval estimate of the mean subway fare given that the price of a slice of pizza is $2.25.

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Elementary Statistics

ISBN: 9780321500243

11th Edition

Authors: Mario F. Triola

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