Question: Question 20 (1 point) An activity on a PERT network has the following time estimates: optimistic = 6, most likely = 18, and pessimistic =

Question 20 (1 point) An activity on a PERT network has the following time estimates: optimistic = 6, most likely = 18, and pessimistic = 26. Its expected time is (please round off to two decimal digits) Your Answer: Your Answer Question 21 (1 point) An activity on a PERT network has the following time estimates: optimistic = 9. most likely = 19, and pessimistic = 30. Its variance is (please round off to two decimal digits) Your Answer: Your Answer Question 22 (1 point) An activity on a PERT network has the following time estimates: optimistic = 6, most likely = 15, and pessimistic = 21. Its standard deviation is (please round off to two decimal digits)

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