Randomly selected students participated in an experiment to test their ability to determine when one minute(or sixty seconds) has passed. Forty students yielded a sample mean of 61.8 seconds.

Assuming that o= 11.7 seconds, Construct and interpret a 99% confidence interval estimate of the population mean of all
students. What is the 99% confidence interval for the population mean u.

1 answer

618-+2.575*11.7/sqrt((40)) = (, )?