Mathematics, 02.04.2021 17:00, queenb1416

A group of 20 randomly selected students has a mean age of 21 years and a standard deviation of 2.1 years. Assume the population has a normal distribution. Construct a 90% confidence interval for the population mean.

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A group of 20 randomly selected students has a mean age of 21 years and a standard deviation of 2.1...