A Manager Is Interested in the Amount of Time Employees

Multiple Choice

A manager is interested in the amount of time employees spend each day playing video games at work.The manager takes a random sample of 18 employees who showed a mean time of 55 minutes per day with a standard deviation of 5 minutes.Assuming that these times follow a normal distribution,compute a 90% confidence interval for the average amount of time employees spend playing video games each day at work.

A) [52.39,57.61]
B) [52.95,57.05]
C) [52.82,57.18]
D) [53.34,56.66]
E) [52.46,57.54]