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You measure 40 textbooks' weights, and find they have a mean weight of 79 ounces. Assume the population is normally distributed with a standard deviation

You measure 40 textbooks' weights, and find they have a mean weight of 79 ounces. Assume the population is normally distributed with a standard deviation of 5.2 ounces. Based on this, construct a 99% confidence interval for the true population mean textbook weight. Give your answers correct to at least two decimal places. Lower Limit = Upper Limit = Check

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