A sample is used to obtain a 95% confidence interval for the mean of a population.The confidence interval goes from 78.21 to 87.64.If the same sample had been used to test the null hypothesis that the mean of the population differs from 90,the null hypothesis could be rejected at a level of significance of 0.05.

Question

Quizplus · Accepted Answer

Since the confidence interval for the mean of the population does not contain 90, we can conclude that the null hypothesis that the mean of the population equals 90 can be rejected at a level of significance of 0.05. Therefore, the statement is true.

A Sample Is Used to Obtain a 95% Confidence Interval