Suppose a 90% confidence interval for the mean time it takes to serve a customer at a drive-in bank is 120 seconds to 220 seconds. At the 90% confidence level, there is not enough evidence to conclude that the mean service time is not 200 seconds.

Question

Quizplus · Accepted Answer

Since the confidence interval contains the value of 200 seconds, we cannot reject the null hypothesis that the mean service time is 200 seconds. Therefore, there is not enough evidence to conclude that the mean service time is not 200 seconds at the 90% confidence level.

Suppose a 90% Confidence Interval for the Mean Time It