The Employees of Cybertronics Inc

Multiple Choice

The employees of Cybertronics Inc.need to complete a certification online.A random sample of 49 employees gives an average time for completion of all the coursework and passing the tests of 20 hours.Assume that the population standard deviation is 6 hours and the population of employees is fairly large.Construct a 95% confidence interval for the average time required to complete the certification.

A) 18.28 to 21.72
B) 18.32 to 21.68
C) 18.36 to 21.64
D) 18.40 to 21.60
E) 19.76 to 20.24