You Have Just Used the Network Planning Model for a County

Multiple Choice

You have just used the network planning model for a county road resurfacing project and found the critical path length is 40 days and the standard deviation of the critical path is 10 days. Suppose you want to pick a time (in days) within which you will complete the project with 90% confidence level, what should be that time (in days and round to the nearest whole number.)

A) 40
B) 13
C) 45
D) 29
E) 53