Question: Using the data Exercise 12.16, (a) Estimate 2 using the multiple regression of y on x 1 , x 2 , and x 3

Using the data Exercise 12.16,

(a) Estimate σ2 using the multiple regression of y on x1, x2, and x3.

(b) Compute a 95% prediction interval for the observed device gain for three regressor at x1 = 15.0, x2 = 220.0, and x3 = 6.0.

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