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You want to analyze the travel-to-work time for San Francisco residents. Suppose that a preliminary simple random sample of 24 residents of San Francisco resulted
You want to analyze the travel-to-work time for San Francisco residents. Suppose that a preliminary simple random sample of 24 residents of San Francisco resulted in a planning value of 10 minutes for the population standard deviation. In order to estimate the population mean travel-to-work time for San Francisco residents with a margin of error of no more than two minutes and a 95% confidence level, what is the minimum sample size that can be used?
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