What is the estimated standard deviation of the duration for activity E?
A) 2 days
B) 3 days
C) 4 days
D) 16 days
E) 24 days

Question

Quizplus · Accepted Answer

The estimated standard deviation for activity E can be calculated using the formula:
Standard deviation = (Optimistic duration - Pessimistic duration) / 6
For activity E, the optimistic duration is 12 days and the pessimistic duration is 24 days. 
Therefore, Standard deviation = (24 - 12) / 6 = 2.
Hence, the estimated standard deviation for activity E is 2 days and the best choice is C).

What Is the Estimated Standard Deviation of the Duration for Activity