14.27 Corn and manure In Example 10, the coefficient of the manure-level indicator variable m is 1.96.

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14.27 Corn and manure In Example 10, the coefficient of the manure-level indicator variable m is 1.96.

a. Explain why this coefficient is the estimated difference in mean corn yield between the high and low levels of manure, for each level of fertilizer.

b. Explain why the 95% confidence interval for the difference in mean corn yield between the high and low levels of manure is 1.96 { 2.1110.7472.

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Statistics The Art And Science Of Learning From Data

ISBN: 9781292164878

4th Global Edition

Authors: Alan Agresti, Christine A. Franklin, Bernhard Klingenberg

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