Question: information 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

information for Problems 18-20. The following is

information 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 and o 2 have been computed for you. You need to compute the rest 5 3. Itm Ite 14 2 Activity to 11-2 2 11-3 4 12 - 4 1 2-5 3 13-4 1 13-6 1 4-6 1 15 - 6 7 3 top 16 10 5 9 5 16 3 2 4 7 3 16 3 2 ? 3 un Wu 10.4444 1.0000 10.4444 1.0000 0.4444 10.1111 ? 10.4444 9 11 1 3 What is the average completion time of the entire project? O 15 days O 16 days O 17 days O 18 days What is standard deviation of the project completion time"? O 1.972 O 1.915 02.055 O 1.826 What is the probability that the project will be completed within 20 days? O 0.8340 O 0.9357 O 0.9817 0.9955

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