The manager of a computer help desk operation has collected enough data to conclude that the distribution of 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. 0.4756
B. Approximately 0.1076
C. About 0.00001
D. Can’t be determined without more information.
Answer:C
The manager of a computer help desk operation has collected enough data to conclude that the distribution of 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. 0.4756 B. Approximately 0.1076 C. About 0.00001 D. Can’t be determined without more information.