Question 1

Which of the following control charts is used to monitor the number of defective items within a sample?

Accepted Answer

A) xbar 
B) R 
C) c 
D) p 
A) xbar 
B) R 
C) c 
D) p

Question 2

The process capability index is used only for p and c charts while the process capability ratio is used only for xbar and R charts.

Accepted Answer

A) True 
 B)False

Question 3

Statistical process control is only effective for service processes.

Accepted Answer

A) True 
 B)False

Question 4

All processes contain a certain amount of variation in their output.

Accepted Answer

A) True 
 B)False

Question 5

Why are   and R-charts used together?

Accepted Answer

When monitoring a variables characterist

Question 6

The process capability index indicates how much a process mean differs from the target specification value.

Accepted Answer

A) True 
 B)False

Question 7

The formula used to determine the upper and lower control limits are based on specification limits.

Accepted Answer

A) True 
 B)False

Question 8

The smaller the historical proportion defective reported for a process,the larger the sample size required to detect special cause variation with a p-chart.

Accepted Answer

A) True 
 B)False

Question 9

Only certified statisticians should use Excel to construct a control chart for a process.

Accepted Answer

A) True 
 B)False

Question 10

The R-chart is used for monitoring and controlling variation within samples.

Accepted Answer

A) True 
 B)False

Question 11

If the quality of a process's output is determined by the difference between the largest and smallest values in a sample,use an)_______control chart.

Accepted Answer

A) xbar 
B) R 
C) c 
D) p 
A) xbar 
B) R 
C) c 
D) p

Question 12

If the quality of a process's output is determined by classifying the output as being defective or not defective,use an)________control chart.

Accepted Answer

A) xbar 
B) R 
C) c 
D) p 
A) xbar 
B) R 
C) c 
D) p

Question 13

Excel can be used to increase the efficiency and accuracy of determining the process capability ratio and the process capability index.

Accepted Answer

A) True 
 B)False

Question 14

Control limits are based on the special cause variation inherent in a process.

Accepted Answer

A) True 
 B)False

Question 15

A quantitative variable classifies while a qualitative variable attribute)measures.

Accepted Answer

A) True 
 B)False

Question 16

Statistical process control is a subset of statistical quality control.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is NOT a characteristic of a control chart?

Accepted Answer

A) the centerline is determined using special cause variations. 
B) the upper and lower control limits are based on special cause variation. 
C) the centerline is determined by using the target value. 
D) none of the above are true. 
A) the centerline is determined using special cause variations. 
B) the upper and lower control limits are based on special cause variation. 
C) the centerline is determined by using the target value. 
D) none of the above are true.

Question 18

Which of the following is NOT a primary purpose of statistical process control?

Accepted Answer

A) to establish control limits 
B) to detect special cause variations 
C) to identify specification limits 
D) to determine when a process is not in control 
A) to establish control limits 
B) to detect special cause variations 
C) to identify specification limits 
D) to determine when a process is not in control

Question 19

A company produces a product which is designed to weigh 10 oz. ,with a tolerance of   oz.The process produces products with an average weight of 9.95 oz.and a standard deviation of 0.10 oz.The process capability index for this process with z = 3 is

Accepted Answer

A) 1.50 
B) -1.50 
C) 1.83 
D) -1.83 
A) 1.50 
B) -1.50 
C) 1.83 
D) -1.83

Question 20

For a given process,the process capability ratio is NOT related to its control limits.

Accepted Answer

A) True 
 B)False

Exam 3: Statistical Quality Control

Which of the following control charts is used to monitor the number of defective items within a sample?

The process capability index is used only for p and c charts while the process capability ratio is used only for xbar and R charts.

Statistical process control is only effective for service processes.

All processes contain a certain amount of variation in their output.

Why are and R-charts used together?

The process capability index indicates how much a process mean differs from the target specification value.

The formula used to determine the upper and lower control limits are based on specification limits.

The smaller the historical proportion defective reported for a process,the larger the sample size required to detect special cause variation with a p-chart.

Only certified statisticians should use Excel to construct a control chart for a process.

The R-chart is used for monitoring and controlling variation within samples.

If the quality of a process's output is determined by the difference between the largest and smallest values in a sample,use an)_______control chart.

If the quality of a process's output is determined by classifying the output as being defective or not defective,use an)________control chart.

Excel can be used to increase the efficiency and accuracy of determining the process capability ratio and the process capability index.

Control limits are based on the special cause variation inherent in a process.

A quantitative variable classifies while a qualitative variable attribute)measures.

Statistical process control is a subset of statistical quality control.

Which of the following is NOT a characteristic of a control chart?

Which of the following is NOT a primary purpose of statistical process control?

A company produces a product which is designed to weigh 10 oz. ,with a tolerance of oz.The process produces products with an average weight of 9.95 oz.and a standard deviation of 0.10 oz.The process capability index for this process with z = 3 is

For a given process,the process capability ratio is NOT related to its control limits.

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