Mathematics, 19.12.2019 04:31 kealalac1

We wish to construct a 90% confidence interval on the mean of a population known to be normally distributed based on a sample of 20 observations having a sample mean of 8 and a sample standard deviation of 2.
what is the margin of error for this confidence interval?

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We wish to construct a 90% confidence interval on the mean of a population known to be normally dist...