You have been recently been assigned to provide an accurate project schedule for a large construction project. You are evaluating the network diagram for the construction project.
Your lead engineer has given you following estimates for critical path activity: 30 days (optimistic), 100 days (pessimistic), and 50 days (most likely).
What is the standard deviation for this activity, assuming a beta distribution?
A. 55
B. 8.33
C. None of the choices are correct
D. 11.66
E. 3.33
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