Assume that task J has a most likely duration of 20 days,an optimistic duration of 13 days,and a pessimistic duration of 30 days.If the optimistic and pessimistic durations are 95 percent estimates,the standard deviation for task J is ________ days.
A)5.167
B)5
C)4.67
D)3.2

Question

Quizplus · Accepted Answer

The standard deviation for a beta distribution is given by:σ = (b - a) / 6where a is the optimistic duration, b is the pessimistic duration, and σ is the standard deviation.In this case, a = 13, b = 30, so:σ = (30 - 13) / 6 = 5.167Therefore, the standard deviation for task J is 5.167 days.

Assume That Task J Has a Most Likely Duration of 20