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The dean of a college wants to use the mean of a random sample to estimate the average time students take to get from

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The dean of a college wants to use the mean of a random sample to estimate the average time students take to get from one class to the next. She believes that the population is normally distributed with a standard deviation of 23 minutes. How large a sample should she take to estimate the mean time to within 5 minutes with 93% confidence? Sample Size=

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