Lemma
EasyNormal distribution
OpenStax, Introductory Statistics 2e §8.1 A Single Population Mean using the Normal Distribution · Try It 1 · Statistics · Normal distribution

A Single Population Mean using the Normal Distribution · Try It 1

Suppose we have data from a sample. The sample mean is 15, and the error bound for the mean is 3.2.
What is the confidence interval estimate for the population mean?

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OpenStax, Introductory Statistics 2e · §8.1 A Single Population Mean using the Normal Distribution · Try It 1

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