3. A random sample of 60 female memebers of health clubs in Dallas showed that they spend, on average, 4 hours per week doing physical exercise and a have a standard deviation of .75 hours. Find a 99% confidence interval for the population mean. Round to the nearest hundredth on all calculations.

x-bar =_____________

s =_____________________

n =_______________

critical value =_____________

E =________________________

confidence interval, least to greatest:___________to______________