The formula for the variance of the duration of an activity is ______.
A)the square root of [1/6(b - a)]
B)[1/6(a - b)] raised to the power of 2
C)[1/6(b - a)] raised to the power of 2
D)the square root of [1/6(a - b)]

Question

Quizplus · Accepted Answer

The formula for the variance of the duration of an activity is [(b - a) / 6]^2, where a is the optimistic time estimate for the activity, and b is the pessimistic time estimate. Option A and D have the square root applied incorrectly, while option B has the fraction inverted.

The Formula for the Variance of the Duration of an Activity