Mathematics, 20.03.2020 18:24, Charley9752

A researcher estimates the 90% CI for a sample with a mean of M = 8.9 and a standard error (sigma_M) of 2.1. What is the confidence interval at this level of confidence?

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A researcher estimates the 90% CI for a sample with a mean of M = 8.9 and a standard error (sigma_M)...