Question: Refer to the data in Exercise 11-1 on y intrinsic permeability of concrete and x compressive strength. Find a 95% confidence interval on each of

Refer to the data in Exercise 11-1 on y intrinsic permeability of concrete and x compressive strength. Find a 95% confidence interval on each of the following:

(a) Slope

(b) Intercept

(c) Mean permeability when x 2.5

(d) Find a 95% prediction interval on permeability when x 2.5. Explain why this interval is wider than the interval in part (c).

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