Confidence Interval for a Population Mean Practice Test

About 95% of all students at the university studied between 62 and 78 minutes the night before the midterm.

In 95% of random samples of 40 students, the sample mean study time will fall between 62 and 78 minutes.

There is a 95% probability that the population mean study time is between 62 and 78 minutes.

The true population mean study time is guaranteed to be between 62 and 78 minutes because the confidence level is 95%.

If many random samples of 40 students were taken and a 95% confidence interval computed each time, about 95% of those intervals would contain the true population mean study time.