An employer wants to set a time limit so that 90% of the employees will finish a job on time. Past history has shown that the time required to do the job is normally distributed and has a mean time of 32 minutes with a standard deviation of 6 minutes. How much time should the employer allow employees to finish the job? (Round up to the nearest minute.)© BrainMass Inc. brainmass.com June 3, 2020, 10:47 pm ad1c9bdddf
The z value for 90% is: 1.2816
Using the z formula:
z = (x-mean)/standard ...
Step by step solution to the problem is provided.