An activity on a PERT network has the following time estimates: optimistic = 1, most likely = 18, and pessimistic = 25. Its expected time is (please round off to two decimal digits)

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Question 21 (1 point)

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An activity on a PERT network has the following time estimates: optimistic = 5, most likely = 13, and pessimistic = 29. Its variance is (please round off to two decimal digits)

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Question 22 (1 point)

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An activity on a PERT network has the following time estimates: optimistic = 1, most likely = 20, and pessimistic = 24. Its standard deviation is (please round off to two decimal digits)

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Question 23 (1 point)

A local project being analyzed by PERT has 14 activities, 9 of which are on the critical path. If the estimated time along the critical path is 105 days with a project variance of 25, what is the probability that the project will be completed in 100 days or less? (please answer to four decimal places)

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Question 24 (1 point)

A local project being analyzed by PERT has 14 activities, 9 of which are on the critical path. If the estimated time along the critical path is 105 days with a project variance of 25, what is the probability that the project will be completed in 110 days or less? (please answer to four decimal digits)

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Question 25 (1 point)

A project whose critical path has an estimated time of 170 days with a variance of 100 has a 25% chance that the project will be completed before day (please round off to two decimal digits)

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Question 26 (1 point)

If an activity whose normal duration is 72 days can be shortened to 28 days for an added cost of $4210, what is the crash cost per period? (please round off to two decimal digits)

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