How large of sample is needed to ensure that the probability

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The number of hours spent studying by students on a large campus in the week before final exams follows a normal distribution with a standard deviation of 8.4 hours.A random sample of these students is taken to estimate the population mean number of hours studying.

how large of a sample is needed to ensure that the probability that the sample mean differs from the population mean by more than 2.0 hours is less than 0.05 ?

Reference no: EM13245489

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