Question

5-9 answer only, 10 please tell me how to get the answer.

mal limits (keep three deci 5 What are the upper and lower control chart limits using 3-sigma I places if necessary and select the closest one) (d) (6.583, 33.416] () [17,23] (d) I6.583, 33.41 (o) [o.o96, 0.105) (e) (0.037,0.163] (b) 10.099, 0.101) 6. Is the process in control? (a) Yes (b) No 7. If the parking office didn't count how many vehicle every day, is the process s were checked in control using an appropriate 2-sigma control chart? (a) Yes (b) No 8. Which of the following statements is TRUE about project management? (a) Budgeting is one phase of project management. (b) Gantt charts give a timeline for cach of a project's activities, and they also adequately illustrate the interrelationships between the activities and the resources (c) Work breakd own structure or WBS is a useful tool in project management because it addresses the timing of individual activity (d) Slack is th e amount of time an activity can be delayed without delaying the entire project (e) Some activities on the critical path may have slack 9. Which of the following statements is TRUE about CPM and PERT? (a) PERT assumes that activity durations are known. (b) CPM assumes activity durations can vary. (c) The probability that the project will be completed by the expected time is 50% in PERT. d) The optimistic time estimate in PERT is an estimate of the maximum time an activity will require (e) All activities contribute to the project variance in PERT. 10. A contractor's project being analyzed by PERT has an estimated time for the critical path of 120 days. The sum of all activity variances is 100; the sum of variances along the critical path is 64. What is the probability that the project will take 130 days to complete? (a) about 89% (b) about 84% (c) about 56% (d) about 54% (e) less than 50% 2/9