11.66 After a regression model is fit to a set of data, a confidence interval for the...

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11.66 After a regression model is fit to a set of data, a confidence interval for the mean value of Y at a given setting of the independent variables will always be narrower than the corresponding prediction interval for a particular value of Y at the same setting of the independent variables.Why?

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Probability And Statistics For Engineers

ISBN: 9781133006909

5th Edition

Authors: Richard L Scheaffer, Madhuri Mulekar, James T McClave, Cecie Starr

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