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. What is the probability that three randomly monitored calls will each be completed in 4 minutes or less?
A) about 0.00001
B) about 0.4756
C) about 0.0244
D) about 0.0732
E) about 0.1076

Question

Quizplus · Accepted Answer

The probability of a single call being completed in 4 minutes or less is very low due to the mean being 8.21 minutes. The probability of all three calls being completed in 4 minutes or less is even lower, making option A the most plausible.

The Manager of a Computer Help Desk Operation in Moncton