(Step-by-Step) Refer to the previous exercise. Suppose that 64 smokers (instead of 49) were sampled. Assume the sample mean and the sample standard deviation
Question: Refer to the previous exercise. Suppose that 64 smokers (instead of 49) were sampled. Assume the sample mean and the sample standard deviation remained the same ($20 and $5, respectively).
- What is the 95 percent confidence interval estimate of \(\mu \) ?
- Explain why this confidence interval is narrower than the one determined in the previous exercise.
Deliverable: Word Document 
(See) Develop a 90 percent confidence interval for the population
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