QUESTION 5 20 points Save Answer Installing a muffler at Barut Garage, Inc. involves a live

QUESTION 5 20 points Save Answer Installing a muffler at Barut Garage, Inc. involves a live work lasks. Azra has timed workers performing these lasks seven imes, with the resulls (in minules) shown in the following table. tS ect correct mflers 各 Xi 3I Complete 5 paperwork | 8 |9 | 10 | 9 | 10 | 8 | 85 Given that Azra does not want an error of more than 0.08 and a confidence level less than 0.30 answer the following Provide thez Does the number of observations for the following tasks amant such confidence level? Round to the nearest hundrecth, for example 4.22 Enter YES I ask # 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 or NO

QUESTION 5 20 points Save Answer Installing a muffler at Barut Garage, Inc. involves a live work lasks. Azra has timed workers performing these lasks seven imes, with the resulls (in minules) shown in the following table. tS ect correct mflers 各 Xi 3I Complete 5 paperwork | 8 |9 | 10 | 9 | 10 | 8 | 85 Given that Azra does not want an error of more than 0.08 and a confidence level less than 0.30 answer the following Provide thez Does the number of observations for the following tasks amant such confidence level? Round to the nearest hundrecth, for example 4.22 Enter YES I ask # 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 or NO

Expert Answer

Answer

Z score at 90% confidence level = 1.65

No. Task 1 2 3 4 5 6 7 Sample Average
(A)
Sample SD
(s)
Error level
(e )
Z n
=(z.s / e.A)^2
3 Install new muffler 13 11 11 12 14 13 14 12.5714286 1.27241802 0.08 1.65 4.357910156
5 Complete paperwork 9 8 9 10 9 10 8 9 0.81649658 0.08 1.65 3.501157407
No. Task 1 2 3 4 5 6 7 Sample Average
(A)
Normal Time
N=A x PR
Standard Time
S=N x (1.15)
2 Remove old muffler 8 5 7 5 7 5 8 6.42857143 7.71428571 8.871428571
4 Inspect the work 4 3 4 3 4 4 3 3.57142857 3.92857143 4.517857143
No. Task 1 2 3 4 5 6 7 Sample Average
(A)
Normal Time
N=A x PR
Standard Time
S=N x (1.15)
1 Select correct muffler 3 3 6 3 5 3 3 3.71428571 3.15714286 3.630714286
2 Remove old muffler 8 5 7 5 7 5 8 6.42857143 7.71428571 8.871428571
3 Install new muffler 13 11 11 12 14 13 14 12.5714286 13.8285714 15.90285714
4 Inspect the work 4 3 4 3 4 4 3 3.57142857 3.92857143 4.517857143
5 Complete paperwork 9 8 9 10 9 10 8 9 7.65 8.7975
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