Question: The sample means corresponding to populations 1 and 2 in Exercise 11.4 are 1 = 88.0 and 2 = 83.9. a. Find a 90% confidence

The sample means corresponding to populations 1 and 2 in Exercise 11.4 are 1 = 88.0 and 2 = 83.9.
a. Find a 90% confidence interval for μ1.
b. Find a 90% confidence interval for the difference (μ1 - μ2).

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