Question: Using the chart of activity data provided, what is expected standard deviation for activity B is Time (weeks) Activity Optimistic Most Likely Pessimistic A 9

Using the chart of activity data provided, what is expected standard deviation for activity B is

Time (weeks)
Activity Optimistic Most Likely Pessimistic
A 9 12 21
B 13 21 23

A. 10 weeks

B. 3.33 weeks

C. 2.78 weeks

D. 1.67 weeks

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