Determining Sample Size. In Exercises 1922, assume that
Chapter 7, Problem 22(choose chapter or problem)
Determining Sample Size. In Exercises 1922, assume that each sample is a simplerandom sample obtained from a normally distributed population. Use Table 7-2 to findthe indicated sample size. U.S. Incomes You want to estimate the standard deviation of the population of currentannual incomes of adults in the United States. Find the minimum sample size needed to be99% confident that the sample standard deviation is within 5% of the population standarddeviation. Does the population of incomes have a normal distribution, and how is the samplesize affected by the distribution?
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