Consider the data and simple linear regression model in Exercise 6-5. (a) Find the mean permeability given

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Consider the data and simple linear regression model in Exercise 6-5.

(a) Find the mean permeability given that the strength is 2.1.

(b) Compute a 99% CI on this mean response.

(c) Compute a 99% PI on a future observation when the strength is equal to 2.1.

(d) What do you notice about the relative size of these two intervals? Which is wider and why?

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Engineering Statistics

ISBN: 9780471388791

2nd Edition

Authors: Douglas C. Montgomery, George C. Runger, Norma F. Hubele

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