It Has Been Hypothesized That on Average Employees Spend One

Short Answer

It has been hypothesized that on average employees spend one hour a day playing video games at work. To test this at her company, a manager takes a random sample of 35 employees, who showed a mean time of 55 minutes per day with an assumed population standard deviation of 5 minutes. What is the critical value for testing these hypotheses that the employees spend a different amount of time from one hour (60 minutes) at α = .01?