Question: Consider the semiconductor data in Exercise 12-9. (a) Find 99% confidence intervals on the regression coefficients. (b) Find a 99% prediction interval on HFE when

Consider the semiconductor data in Exercise 12-9.

(a) Find 99% confidence intervals on the regression coefficients.

(b) Find a 99% prediction interval on HFE when x1  14.5, x2  220, and x3  5.0.

(c) Find a 99% confidence interval on mean HFE when x1 

14.5, x2  220, and x3  5.0.

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