Question: Informations for Problems 18-20. The following is a PERT model. The three estimates of the activity times are given in the table below. Most but

Informations for Problems 18-20. The following is a PERT model. The three estimates of the activity times are given in the table below. Most but not all of the te and a 2 have been computed for you. You need to compute the rest. to te 14 15 16 Activity 11-2 1 - 3 12-5 12-4 3-4 3-6 14.5 15-6 12 B 3 11 5 2 2 tm 4 S 6 IS 3 8 13 $ ITP 17 8 9 7 5 11 10 8 2 1.0000 1.0000 1.0000 10.4444 10.4444 1.0000 2 1.0000 3 8 1 S What is the average completion time of the entire project? O 15 days O 16 days 17 days O 18 days QUESTION 19 What is standard deviation of the project completion time? 1.915 02.055 O 1.795 O 1.944 QUESTION 20 What is the probability that the project will be completed with 20 days? O 0.8340 0 0.9382 O 0.9871 O 0.9418

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