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You measure 47 textbooks' weights, and find they have a mean weight of 74 ounces. Assume...

You measure 47 textbooks' weights, and find they have a mean weight of 74 ounces. Assume the population standard deviation is 10.3 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight.

Give your answers as decimals, to two places

I am 90% confident that the mean weight of textbooks is between  and ounces.

Math   Statistics-And-Probability   
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