Question 1

A double-sampling plan is usually less expensive than a single-sampling plan if the lot has a low number of defectives.

Accepted Answer

A) True 
 B)False  True

Question 2

The quality manager has fixed n = 20 and c = 2 for a single-attribute sampling plan.Given AQL = 0.01 and LTPD = 0.05,what is the producer's risk? Table G.1 is appended to this exam.

Accepted Answer

A) between 0.0001 and 0.01 
B) between 0.01 and 0.1 
C) between 0.99 and 0.9999 
D) between 0.9 and 0.99 
A) between 0.0001 and 0.01 
B) between 0.01 and 0.1 
C) between 0.99 and 0.9999 
D) between 0.9 and 0.99 A

Question 3

The management of a company wishes to develop a new acceptance sampling plan that keeps acceptable quality level,lot tolerance proportion defective,and c constant.If the sample size (n)is increased,compared to the prior plan,which of the following is TRUE?

Accepted Answer

A) α increases 
B) α decreases 
C) β increases 
D) α and β increase 
A) α increases 
B) α decreases 
C) β increases 
D) α and β increase A

Question 4

Discuss producer's risk and consumer's risk.

Accepted Answer

Producer's risk is the chance that good

Question 5

A sample of 100 items is randomly selected from a shipment of incoming materials.AQL and LTPD have been established at 0.01 and 0.07,respectively.When four or more defective items are found in a sample,the shipment is rejected.What is the value of β? Table G.1 is appended to this exam.

Accepted Answer

A) less than or equal to 0.05 
B) greater than 0.05 but less than or equal to 0.10 
C) greater than 0.10 but less than or equal to 0.15 
D) greater than 0.15 
A) less than or equal to 0.05 
B) greater than 0.05 but less than or equal to 0.10 
C) greater than 0.10 but less than or equal to 0.15 
D) greater than 0.15

Question 6

Use Table G.1 for the following question.What is the acceptance number of a single-sampling plan if n = 400,AQL = 0.002,and α= 0.01?

Accepted Answer

A) c = 0 
B) c = 1 
C) c = 2 
D) c = 3 
A) c = 0 
B) c = 1 
C) c = 2 
D) c = 3

Question 7

A double-sampling plan requires two sample sizes and two acceptance numbers.

Accepted Answer

A) True 
 B)False

Question 8

An ideal OC curve is shaped like a ________.

Accepted Answer

The answer of An ideal OC curve is shaped like...

Question 9

A single-sampling plan has the following performance:   What is the average outgoing quality limit if the sample size is 200 and the lot size is 6,000?

Accepted Answer

A) less than or equal to 0.0200 
B) greater than 0.0200 but less than or equal to 0.0220 
C) greater than 0.0220 but less than or equal to 0.0230 
D) greater than 0.0230 
A) less than or equal to 0.0200 
B) greater than 0.0200 but less than or equal to 0.0220 
C) greater than 0.0220 but less than or equal to 0.0230 
D) greater than 0.0230

Question 10

A quality manager has established a sampling plan that calls for a sample size of 200 units and an acceptance number of 3.The supplier has agreed to a contract that calls for an AQL of 0.01 and an LTPD of .03.What is the consumer's risk? Table G.1 is appended to this exam.

Accepted Answer

A) less than 0.14 
B) between 0.14 and 0.15 
C) between 0.15 and 0.16 
D) greater than 0.16 
A) less than 0.14 
B) between 0.14 and 0.15 
C) between 0.15 and 0.16 
D) greater than 0.16

Question 11

This OC curve represents a sampling plan developed for a lot size of 1000,a sample size of 15,and an acceptance number of 2.The probability of acceptance for each of the first six points appears next to the plotted point.What incoming fraction defective is associated with the average outgoing quality limit?

Accepted Answer

A) 0.10 
B) 0.15 
C) 0.20 
D) 0.25 
A) 0.10 
B) 0.15 
C) 0.20 
D) 0.25

Question 12

If you were interested in minimizing the average number of items inspected,which type of sampling plan would you choose? Why?

Accepted Answer

The sequential sampling plan m

Question 13

A quality manager has established a sampling plan that calls for a sample size of 75 units and an acceptance number of 2.The supplier has agreed to a contract that calls for an AQL of 0.02 and an LTPD of .04.What is the probability of accepting the lot if the actual percentage of defective is 3%? Table G.1 is appended to this exam.

Accepted Answer

A) less than 0.63 
B) between 0.63 and 0.66 
C) between 0.66 and 0.69 
D) greater than 0.69 
A) less than 0.63 
B) between 0.63 and 0.66 
C) between 0.66 and 0.69 
D) greater than 0.69

Question 14

A lot of 1,000 items is on the loading dock.A single-sampling plan calls for a sample size of 10.The following table gives the probability of acceptance for the plan over a range of possible quality levels.   What is the average outgoing quality limit for this plan?

Accepted Answer

A) less than or equal to 0.018 
B) greater than 0.0180 but less than or equal to 0.0200 
C) greater than 0.0200 but less than or equal to 0.0220 
D) greater than 0.0220 
A) less than or equal to 0.018 
B) greater than 0.0180 but less than or equal to 0.0200 
C) greater than 0.0200 but less than or equal to 0.0220 
D) greater than 0.0220

Question 15

________ is the quality level desired by the consumer.

Accepted Answer

Acceptable

Question 16

A manufacturer wants a sampling plan in which AQL = 0.02,LPTD = 0.12,α = 0.05,and β = 0.10.Which of the following values for n and c best satisfy these specifications? Table G.1 is appended to this exam.

Accepted Answer

A) n = 54,c = 3 
B) n = 100,c = 2 
C) n = 200,c = 1 
D) n = 162,c = 0 
A) n = 54,c = 3 
B) n = 100,c = 2 
C) n = 200,c = 1 
D) n = 162,c = 0

Question 17

Which one of the following actions will decrease the producer's risk?

Accepted Answer

A) Increase n and keep c constant. 
B) Decrease n and keep c constant. 
C) Keep n constant and decrease c. 
D) Increase n and decrease c. 
A) Increase n and keep c constant. 
B) Decrease n and keep c constant. 
C) Keep n constant and decrease c. 
D) Increase n and decrease c.

Question 18

A double-sampling plan has n1 = 50,n2 = 100,c1 = 2,and c2 = 4.Suppose on the first sample,one defective item was discovered.What should be done?

Accepted Answer

A) Reject the entire lot. 
B) Take a second sample of 100 units. 
C) Accept the entire lot. 
D) Repair the defective units,and accept the entire lot. 
A) Reject the entire lot. 
B) Take a second sample of 100 units. 
C) Accept the entire lot. 
D) Repair the defective units,and accept the entire lot.

Question 19

A single-sampling plan using a sample size of 50 on a lot size of 2,000 has the following performance:   Today the company making the purchase receives two lots of 2,000 items and the inspection department is in a big hurry.Which action will result in an identical AOQL for the purchasing company?

Accepted Answer

A) Take a random sample of 25 from each lot and accept or reject both lots based on the results. 
B) Take a random sample of 50 from one lot and accept or reject the second lot based on the first lot's results. 
C) Take a random sample of 100 from one lot and accept or reject the second lot based on the first lot's results. 
D) Take a random sample of 50 from each lot and accept or reject each lot based on the results. 
A) Take a random sample of 25 from each lot and accept or reject both lots based on the results. 
B) Take a random sample of 50 from one lot and accept or reject the second lot based on the first lot's results. 
C) Take a random sample of 100 from one lot and accept or reject the second lot based on the first lot's results. 
D) Take a random sample of 50 from each lot and accept or reject each lot based on the results.

Question 20

A single-sampling plan by attributes is needed for a purchased component.Table G.1 is appended to this exam.
Sample size = 100
Acceptance number (c)= 2
Acceptance quality level (AQL)= 0.01
Lot tolerance proportion defective (LTPD)= 0.04
Given the preceding information:

Accepted Answer

a.= .080
b

Exam 23: Acceptance Sampling Plans

A double-sampling plan is usually less expensive than a single-sampling plan if the lot has a low number of defectives.

The quality manager has fixed n = 20 and c = 2 for a single-attribute sampling plan.Given AQL = 0.01 and LTPD = 0.05,what is the producer's risk? Table G.1 is appended to this exam.

The management of a company wishes to develop a new acceptance sampling plan that keeps acceptable quality level,lot tolerance proportion defective,and c constant.If the sample size (n)is increased,compared to the prior plan,which of the following is TRUE?

Discuss producer's risk and consumer's risk.

A sample of 100 items is randomly selected from a shipment of incoming materials.AQL and LTPD have been established at 0.01 and 0.07,respectively.When four or more defective items are found in a sample,the shipment is rejected.What is the value of β? Table G.1 is appended to this exam.

Use Table G.1 for the following question.What is the acceptance number of a single-sampling plan if n = 400,AQL = 0.002,and α= 0.01?

A double-sampling plan requires two sample sizes and two acceptance numbers.

An ideal OC curve is shaped like a ________.

A single-sampling plan has the following performance: What is the average outgoing quality limit if the sample size is 200 and the lot size is 6,000?

A quality manager has established a sampling plan that calls for a sample size of 200 units and an acceptance number of 3.The supplier has agreed to a contract that calls for an AQL of 0.01 and an LTPD of .03.What is the consumer's risk? Table G.1 is appended to this exam.

If you were interested in minimizing the average number of items inspected,which type of sampling plan would you choose? Why?

A lot of 1,000 items is on the loading dock.A single-sampling plan calls for a sample size of 10.The following table gives the probability of acceptance for the plan over a range of possible quality levels. What is the average outgoing quality limit for this plan?

________ is the quality level desired by the consumer.

A manufacturer wants a sampling plan in which AQL = 0.02,LPTD = 0.12,α = 0.05,and β = 0.10.Which of the following values for n and c best satisfy these specifications? Table G.1 is appended to this exam.

Which one of the following actions will decrease the producer's risk?

A double-sampling plan has n1 = 50,n2 = 100,c1 = 2,and c2 = 4.Suppose on the first sample,one defective item was discovered.What should be done?

A single-sampling plan using a sample size of 50 on a lot size of 2,000 has the following performance: Today the company making the purchase receives two lots of 2,000 items and the inspection department is in a big hurry.Which action will result in an identical AOQL for the purchasing company?

A single-sampling plan by attributes is needed for a purchased component.Table G.1 is appended to this exam. Sample size = 100 Acceptance number (c)= 2 Acceptance quality level (AQL)= 0.01 Lot tolerance proportion defective (LTPD)= 0.04 Given the preceding information:

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