Question: Problem 7.39 With reference to the data set on lead levels in childrens blood (Problem 1.18) find a 100(1 )% confidence interval for the

Problem 7.39 With reference to the data set on lead levels in children’s blood (Problem 1.18) find a 100(1 − α)% confidence interval for the differences in lead level between the exposed and control group of children when:

(a) α = 0.10.

(b) α = 0.05.

(c) α = 0.01.

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