Question: Math 117 8.88 When one is attempting to determine the required sample size for estimating a population mean, and the information on the population standard

Math 117

8.88 When one is attempting to determine the required sample size for estimating a population mean, and the information on the population standard deviation is not available, it may be feasible to take a small preliminary sample and use the sample standard deviation to estimate the required sample size, n. Suppose that we want to estimate , the mean commuting distance for students at a community college, to a margin of error within 1 mile with a confidence level of 95%. A random sample of 20 students yields a standard deviation of 4.1 miles. Use this value of the sample standard deviation, s, to estimate the required sample size, n. Assume that the corresponding population has an approximate normal distribution

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