Question: An activity on a PERT network has an optimistic time of 4 hours, a most likely time of 6.25 hours, and a pessimistic time of

An activity on a PERT network has an optimistic time of 4 hours, a most likely time of 6.25 hours, and a pessimistic time of 22 hours. Find its STANDARD DEVIATION.

Group of answer choices 5 hours 4 hours 3 hours 4.5 hours 3.5 hours

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