Question 1

The number of late insurance claim payouts per 100 should be measured with a(n)

Accepted Answer

A) x-bar chart. 
B) R-chart. 
C) p-chart. 
D) c-chart. 
E) either a p or c chart. 
A) x-bar chart. 
B) R-chart. 
C) p-chart. 
D) c-chart. 
E) either a p or c chart.

Question 2

An acceptance sampling plan is to be designed to meet the organization's targets for product quality and risk levels.Which of the following is true?

Accepted Answer

A) n and c determine the AQL. 
B) AQL,LTPD,α and β collectively determine n and c. 
C) n and c are determined from the values of AQL and LTPD. 
D) α and β are determined from the values of AQL and LTPD. 
E) α and β determine the AQL. 
A) n and c determine the AQL. 
B) AQL,LTPD,α and β collectively determine n and c. 
C) n and c are determined from the values of AQL and LTPD. 
D) α and β are determined from the values of AQL and LTPD. 
E) α and β determine the AQL.

Question 3

Consumer's risk is the probability of

Accepted Answer

A) accepting a good lot. 
B) rejecting a good lot. 
C) rejecting a bad lot. 
D) accepting a bad lot. 
E) shipping a bad lot. 
A) accepting a good lot. 
B) rejecting a good lot. 
C) rejecting a bad lot. 
D) accepting a bad lot. 
E) shipping a bad lot.

Question 4

What is the purpose of the Operating Characteristics curve?

Accepted Answer

An OC curve plots the probabil

Question 5

Red Top Cab Company receives multiple complaints per day about driver behavior.Over 9 days the owner recorded the number of calls to be 3,0,8,9,6,7,4,9,8.What is the upper control limit for the c-chart?

Accepted Answer

A) 13.35 
B) 8.45 
C) 24.00 
D) 0.00 
E) 9.03 
A) 13.35 
B) 8.45 
C) 24.00 
D) 0.00 
E) 9.03

Question 6

If a sample of items is taken and the mean of the sample is outside the control limits the process is

Accepted Answer

A) out of control and the cause should be established. 
B) in control,but not capable of producing within the established control limits. 
C) within the established control limits with only natural causes of variation. 
D) monitored closely to see if the next sample mean will also fall outside the control limits. 
E) producing high quality products. 
A) out of control and the cause should be established. 
B) in control,but not capable of producing within the established control limits. 
C) within the established control limits with only natural causes of variation. 
D) monitored closely to see if the next sample mean will also fall outside the control limits. 
E) producing high quality products.

Question 7

The purpose of an x-bar chart is to determine whether there has been a

Accepted Answer

A) change in the dispersion of the process output. 
B) change in the percent defective in a sample. 
C) change in the central tendency of the process output. 
D) change in the number of defects in a sample. 
E) change in the AOQ. 
A) change in the dispersion of the process output. 
B) change in the percent defective in a sample. 
C) change in the central tendency of the process output. 
D) change in the number of defects in a sample. 
E) change in the AOQ.

Question 8

The ________ is a quality control chart used to control the number of defects per unit of output.

Accepted Answer

The answer of The ________ is a quality control chart...

Question 9

A retail store manager is trying to improve and control the rate at which cashiers sign customers up
for store credit cards.After posting a p-chart of the store's credit card sign-ups the manager takes
new samples of size 50 three weeks later.He finds that each sample of 50 contained 5 credit card
signups on average.Find p-bar and 99.73% control limits.

Accepted Answer

P-bar = 5/50 = .1 or 10%.Sigma-p = sqrt(

Question 10

X-bar charts are used when we are sampling attributes.

Accepted Answer

A) True 
 B)False

Question 11

The width of a bronze bar is intended to be one-eighth of an inch (0.125 inches).Inspection samples contain five bars each.The average range of these samples is 0.01 inches.What are the upper and lower control limits for the x-bar and R-chart for this process,using 3-sigma limits?

Accepted Answer

X-bar: LCL = .119;UC

Question 12

To set   -chart upper and lower control limits,one must know the process central line,which is the

Accepted Answer

A) average of the sample means. 
B) total number of defects in the population. 
C) percent defects in the population. 
D) size of the population. 
E) average range. 
A) average of the sample means. 
B) total number of defects in the population. 
C) percent defects in the population. 
D) size of the population. 
E) average range.

Question 13

The   index measures the difference between desired and actual dimensions of goods or services produced.

Accepted Answer

A) True 
 B)False

Question 14

What is the AOQ of an acceptance sampling plan?

Accepted Answer

The AOQ is the average outgoin

Question 15

Which of the following statements on acceptance sampling is true?

Accepted Answer

A) Acceptance sampling draws samples from a population of items,tests the sample,and accepts the entire population if the sample is good enough,and rejects it if the sample is poor enough. 
B) The sampling plan contains information about the sample size to be drawn and the critical acceptance or rejection numbers for that sample size. 
C) The steeper an operating characteristic curve,the better its ability to discriminate between good and bad lots. 
D) All of the above are true. 
E) All of the above are false. 
A) Acceptance sampling draws samples from a population of items,tests the sample,and accepts the entire population if the sample is good enough,and rejects it if the sample is poor enough. 
B) The sampling plan contains information about the sample size to be drawn and the critical acceptance or rejection numbers for that sample size. 
C) The steeper an operating characteristic curve,the better its ability to discriminate between good and bad lots. 
D) All of the above are true. 
E) All of the above are false.

Question 16

An acceptance sampling plan must define "good lots" and "bad lots" and specify the risk level associated with each one.

Accepted Answer

A) True 
 B)False

Question 17

The p-chart tells us whether there has been a

Accepted Answer

A) gain or loss in dispersion. 
B) change in the percent defective in a sample. 
C) change in the central tendency of the process output. 
D) change in the number of defects in a sample. 
E) none of the above. 
A) gain or loss in dispersion. 
B) change in the percent defective in a sample. 
C) change in the central tendency of the process output. 
D) change in the number of defects in a sample. 
E) none of the above.

Question 18

A manager wishes to build a 3-sigma range chart for a process.The sample size is five,the mean of sample means is 16.01,and the average range is 5.3.From Table S6.1,the appropriate value of   is 0,and   is 2.115.The UCL and LCL for this range chart are

Accepted Answer

A) 33.9 and 11.2. 
B) 33.9 and 0. 
C) 11.2 and 0. 
D) 6.3 and 0. 
E) 31.91 and 0.11. 
A) 33.9 and 11.2. 
B) 33.9 and 0. 
C) 11.2 and 0. 
D) 6.3 and 0. 
E) 31.91 and 0.11.

Question 19

Which of the following is true regarding the average outgoing quality level?

Accepted Answer

A) An AOQ value of 1 is ideal,because all defects have been removed. 
B) AOQ is always greater than AQL but less than LTPD. 
C) AOQ rises (worsens)following inspection of failed lots. 
D) AOQ is very low (very good)for extremely poor quality lots. 
E) AOQ is very high (very bad)for extremely poor quality lots. 
A) An AOQ value of 1 is ideal,because all defects have been removed. 
B) AOQ is always greater than AQL but less than LTPD. 
C) AOQ rises (worsens)following inspection of failed lots. 
D) AOQ is very low (very good)for extremely poor quality lots. 
E) AOQ is very high (very bad)for extremely poor quality lots.

Question 20

In statistical process control,the range often substitutes for the standard deviation.

Accepted Answer

A) True 
 B)False

Exam 18: Statistical Process Control

The number of late insurance claim payouts per 100 should be measured with a(n)

An acceptance sampling plan is to be designed to meet the organization's targets for product quality and risk levels.Which of the following is true?

Consumer's risk is the probability of

What is the purpose of the Operating Characteristics curve?

Red Top Cab Company receives multiple complaints per day about driver behavior.Over 9 days the owner recorded the number of calls to be 3,0,8,9,6,7,4,9,8.What is the upper control limit for the c-chart?

If a sample of items is taken and the mean of the sample is outside the control limits the process is

The purpose of an x-bar chart is to determine whether there has been a

The ________ is a quality control chart used to control the number of defects per unit of output.

X-bar charts are used when we are sampling attributes.

The width of a bronze bar is intended to be one-eighth of an inch (0.125 inches).Inspection samples contain five bars each.The average range of these samples is 0.01 inches.What are the upper and lower control limits for the x-bar and R-chart for this process,using 3-sigma limits?

To set -chart upper and lower control limits,one must know the process central line,which is the

The index measures the difference between desired and actual dimensions of goods or services produced.

What is the AOQ of an acceptance sampling plan?

Which of the following statements on acceptance sampling is true?

An acceptance sampling plan must define "good lots" and "bad lots" and specify the risk level associated with each one.

The p-chart tells us whether there has been a

A manager wishes to build a 3-sigma range chart for a process.The sample size is five,the mean of sample means is 16.01,and the average range is 5.3.From Table S6.1,the appropriate value of is 0,and is 2.115.The UCL and LCL for this range chart are

Which of the following is true regarding the average outgoing quality level?

In statistical process control,the range often substitutes for the standard deviation.

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