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You measure 31 textbooks' weights, and find they have a mean weight of 78 ounces. Assume the population is normally distributed with a standard deviation

You measure 31 textbooks' weights, and find they have a mean weight of 78 ounces. Assume the population is normally distributed with a standard deviation of 11 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight.

Give your answers correct to at least two decimal places.

Lower Limit = Upper Limit =

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