To decide whether to reject a null hypothesis about a population mean, a 95% confidence interval or two-tailed hypothesis test with a significance level of 2.5% could be used.

Question

Quizplus · Accepted Answer

A 95% confidence interval corresponds to a two-tailed hypothesis test with a significance level of 5%, not 2.5%. A 2.5% significance level would correspond to a 97.5% confidence interval.

To Decide Whether to Reject a Null Hypothesis About a Population