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 5% could be used.

Question

Quizplus · Accepted Answer

Both a 95% confidence interval and a two-tailed hypothesis test with a significance level of 5% are methods to determine if there is enough evidence to reject a null hypothesis about a population mean. If the confidence interval does not include the hypothesized mean, or if the p-value in the hypothesis test is less than 0.05, the null hypothesis would be rejected.

To Decide Whether to Reject a Null Hypothesis About a Population