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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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