Question: Problem 7.3 Refer to the data set of Problem 1.18. The sample mean and sample standard deviation of the n = 33 measurements of the

Problem 7.3 Refer to the data set of Problem 1.18. The sample mean and sample standard deviation of the n = 33 measurements of the lead level in the blood of the control group of children are x = 15.88, s = 4.54. Assuming the data come from a normal distribution N(µ, σ2) compute:

(a) a 90% confidence interval for µ.

(b) a 99% confidence interval for µ.

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