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Suppose that textbook weights are normally distributed. You measure 21 textbooks' weights, and find they have...

Suppose that textbook weights are normally distributed. You measure 21 textbooks' weights, and find they have a mean weight of 75 ounces. Assume the population standard deviation is 11.4 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight. Round answers to 2 decimal places.

math   Statistics-And-Probability   
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