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

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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