Reference no: EM132293118

Installing a muffler at Barut Garage, Inc. involves a five work tasks. Azra has timed workers performing these tasks seven times, with the results (in minutes) shown in the following table. No Tasks 1 2 3 4 5 6 7 PR 1 Select correct mufflers 3 4 3 4 3 3 6 120 2 Remove old muffler 7 7 6 5 6 6 5 110 3 Install new muffler 14 14 13 15 12 12 15 110 4 Inspect the work 3 3 4 3 3 3 3 100 5 Complete paperwork 10 9 10 8 7 10 8 85 Given that Azra does not want an error of more than 0.08 and a confidence level less than 0.95 answer the following: Provide the z-score: Round to the nearest hundredth, for example 4.22 Does the number of observations for the following tasks warrant such confidence level? Enter YES or NO. Task # 3 Install new muffler : Task # 5 Complete paperwork : What are the required numbers of observations for these tasks? Enter the number. Task # 3 Install new muffler : Task # 5 Complete paperwork : Assume that the number of observations for the following tasks justifies the confidence level and accuracy mentioned above. Also note that Azra factors in a total of fatigue and personal allowance of 0.20 applied to job time. Provide the following results from your solution: Task Normal Time* Standard Time* # 2 Remove old muffler min min # 4 Inspect the work min min Provide the total standard time* for the whole job: minutes. *Round to the nearest hundredth, for example 8.45 minutes