Unknown population and computes a sample mean


A researcher obtains a sample from unknown population and computes a sample mean of M = 43 with a standard deviation of s = 6.

a. If the sample has n = 16 scores, compute a 90% confidence interval to estimate the unknown population mean.

b. If the sample has n = 36 scores, compute a 90% confidence interval to estimate the unknown population mean.

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Basic Statistics: Unknown population and computes a sample mean
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