Use the following to answer questions 14-19: A design engineer wants to construct a sample mean...

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In: Operations Management

Use the following to answer questions 14-19:

A design engineer wants to construct a sample mean chart and a range chart for controlling the diameter for a component used in surgeries. The following table contains measurements (in millimeters) of the diameter for a component. Four samples of five units each were taken at random two-hour intervals.

14. What is the sample mean for Sample 1?

a. 8.8

b. 10.1

c. 11

d. 8.0

e. 9.2

15.

What is the sample range for Sample 1?

a. 0

b. 1

c. 3

d. 4

e. 2

16. What is the estimate of the process mean for whenever it is in control?

a. 9.30

b. 8.85

c. 10.60

d. 10.00

e. 8.00

17. What is the estimate of the sample average range based upon this limited sample?

a. 1.1

b. 0.0

c. 1.0

d. 2.0

e. 1.5

18. What are the X-bar chart upper and lower control limits?

a. 10.01 and 7.15

b. 9.37 and 8.03

c. 11.87 and 5.83

d. 9.94 and 6.77

e. 9.72 and 7.98

19. What are the R chart upper and lower control limits?

a. 3.165 and 0

b. 4.225 and 0

c. 4.565 and 0

d. 3.855 and 0.042

e. 3.520 and 0

Answer 14: (a) 8.8 is the sample mean for sample 1.

Answer 15: (e) 2 is the sample range for sample 1.

Answer 16: (b) 8.85 is the estimate of the process mean for whenever it is in control.

Answer 17: (e) 1.5 is the estimate of the sample average range based upon this limited sample.

Answer 18: (e) 9.72 and 7.98 are the X-bar chart upper and lower control limits.

Answer 19: (e) 3.520 and 0 are the R chart upper and lower control limits.

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keosha answered 1 year ago

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Use the following information on Black Red to answer questions 14 – 18. JDL is considering whether to discontinue offering credit to customers who currently have late payments on the credit extended to them. Current annual credit sales are $10 million and such a change in policy is expected to reduce sales by 15 percent, cut the firm’s bad-debt losses from 8 to 4 percent, and reduce average collection period from 70 days to 45 days. The firm’s variable cost...

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Use the following to answer questions 11-14: Suppose that firms A, B, C and D are Bertrand duopolists in the salt industry. The market demand curve can be specified as Q=100-3p, Q=qA+qB+qC+qD. (The firms choose prices simultaneously.) The cost to firm A is C(qA)=7qA. The cost to firm B is C(qB)=3qB. The cost to firm C is C(qC)=7qC The cost to firm C is C(qD)=3qD Firm A will earn? (piA=?) Firm B will earn? (piB=?) Firm C will earn? (piC=?)...

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A quality analyst wants to construct a sample mean chart for controlling a packaging process. Each day last week, he randomly selected six packages and weighed each. The data from that activity appears below. Weight (in grams) Day Package 1 Package 2 Package 3 Package 4 Package 5 Package 6 Monday 23 22 23 24 23 21 Tuesday 23 21 19 21 24 20 Wednesday 20 19 20 21 19 20 Thursday 18 19 20 19 21 22 Friday...