Question: Refer to the previous exercise. Suppose that 64 smokers (instead of 49) were sampled. Assume the sample mean remained the same. a. What is the

Refer to the previous exercise. Suppose that 64 smokers (instead of 49) were sampled. Assume the sample mean remained the same.
a. What is the 95% confidence interval estimate of µ?
b. Explain why this confidence interval is narrower than the one determined in the previous exercise.

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