Question

If 4 samples from 4 populations are given, then what is the probability of getting at least one Type 1 error at 95% confidence interval and no Type 1 error?

Answer 1

Answer:

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Explanation:

We do not usually know the population mean, so we may suppose that the mean of one of our samples estimates it. The sample mean may happen to be identical with the population mean but it more probably lies somewhere above or below the population mean, and there is a 95% chance that it is within 1.96 standard errors of it.