The Manager of a Computer Help Desk Operation in Moncton

Multiple Choice

The manager of a computer help desk operation in Moncton has collected enough data to conclude that the time per call is normally distributed with a mean equal to 8.21 minutes and a standard deviation of 2.14 minutes. The manager wants to set the time limit at a level such that it will sound on only 8 percent of all calls. The time limit should be

A) about 11.23 minutes
B) about 5.25 minutes
C) about 14.58 minutes
D) about 10.35 minutes
E) about 20.29 minutes