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A random sample is drawn from a population of unknown standard deviation. Construct a 98% confidence interval for the population mean based on the information

A random sample is drawn from a population of unknown standard deviation. Construct a 98% confidence interval for the population mean based on the information given. a. n = 225, x = 92.0, s = 8.4 b. n = 64, x = 92.0, s = 8.4

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