You measure 21 textbooks' weights, and find they have a mean weight of 62 ounces. Assume the population standard deviation is 14.7 ounces. Based on this, construct a 90% confidence interval for the...

You measure 21 textbooks' weights, and find they have a mean weight of 62 ounces. Assume the population standard deviation is 14.7 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight.


Give your answers as decimals, to two places

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