OPSM 3830 Exam 3 Practice Questions with Correct Answers Latest Update 2025/2026
When the results of quality control are unacceptable, what is the next step? - Answers corrective
action
Statistical process control is ______. - Answers quality control efforts that occur during
production
What is the best synonym for inspection from the below list? - Answers Appraisal
Inspection during transformation is called what? - Answers process control
What are the basic issues of quality control inspection? (Check all that apply.) - Answers How
much and how often to inspect
At what stage of the process inspection should occur
Where inspection should take place
Whether to inspect attributes or variables
Select the best definition of Quality Control. - Answers A process that measures output relative
to a standard and takes action when discrepancies occur.
Which product characteristics would prompt the most intensive inspection? - Answers Low-
volume, high-cost
Which is/are examples of Acceptance Sampling? (Select all that apply.) - Answers Inspection of
raw material batches before production
Inspection of final assembly lots after production
What are some examples of inspection points in the service sector? (Select all applicable
answers.) - Answers Outgoing patient billing accuracy at medical clinic.
Kitchen cleanliness at fast food restaurant at shift start.
Which of the following statements is/are correct about Inspection? - Answers Inspection
involves checking for conformance against a quality standard.
Inspection can occur before, during or after production.
Which type of inspection occurs before and after production? - Answers acceptance sampling
One basic issue of inspection is what type of data to collect. If we can measure the value of a
characteristic, we are collecting ______ data. - Answers variable
Which of the following statements about inspection frequency are is/are correct? - Answers The
,more lots being produced the more inspections are needed.
A stable process will require less frequent checks than an unstable process.
What are the different inspection points in manufacturing? (Select all correct answers.) -
Answers Raw materials & purchased parts before production
Before a costly, irreversible or covering operation/process.
Finished goods after production
Under which conditions would on-site inspection be better than off-site at a specialized test lab?
- Answers Need for quick inspection results due to delivery schedule
Alteration or contamination of samples during transfer to lab
True or false: In acceptance sampling, a type of quality control inspection, 100% of product in a
given lot are checked for conformance. - Answers false
What is the rationale and basis for statistical process control? - Answers Acceptable variation
within probability limits
Given a stable process, we must ask the question whether the ______ of process output is within
an acceptable range. - Answers inherent variability
Select the best definition of assignable variation. - Answers Special, non-random variation
traceable to a definite cause.
Which scenario would indicate the need for off-site testing at a centralized testing facility? -
Answers Customer specifications for satellite component require dust-free, no vibration test
What is the best definition of statistical process control? - Answers Analyze data from some
point in the process to determine if the process is likely to be in or out of control.
When comparing a sampling to a process distribution, what are the most important things to
note? - Answers They have the same means, are normally distributed, and sampling has less
variability.
Random variation in a process indicates __________; whereas non-random variation indicates
process __________. - Answers stability/instability
What does the central limit theorem tell us about the sampling distribution? - Answers It
approaches a normal distribution as sample size increases.
Select the best definition of random variation. - Answers Common variation inherent in a
process occurring by chance.
What is the first step in the control process? - Answers Define in sufficient detail what is to be
, controlled.
Select the best definition of a control chart. - Answers A time-ordered plot of sample statistics
used to determine randomness or non-randomness.
Which of the following statements is/are correct about the sampling distribution? (Select all
applicable answers) - Answers Sampling distribution is a plot of many sample means.
Sampling distribution is narrower than the process distribution.
When +/- 2 standard deviation control limits are used in a process control chart, which of the
below statements are true? - Answers Approximately 95.5% of the time random data points will
fall within (inside) the upper and lower control limits.
Comparing a theoretical sampling distribution to the process distribution, which of the following
is true? - Answers The sampling distribution curve is narrower than the process distribution.
Which of the following statements about Type I error is/are correct? - Answers A Type I error is
concluding non-randomness and being mistaken.
A Type I error's alpha risk equals the probability (area) in the two "tails."
True or false: In the control process, only those characteristics that can be counted or measured
are candidates for control. - Answers true
What is the difference between variable and attribute data? (Select the best answer.) - Answers
Variable data is measured on a continuous scale and attribute data is counted using discrete
numbers.
In a control chart when a data point falls outside the control limits (upper and lower), what must
be concluded? - Answers The process appears non-random and should be checked.
A mean control chart is used to check ______. - Answers for central tendency of a variable
The "average of the sample means" is also known by what term? - Answers X-double bar
When a sample average falls inside the control limits, what can be concluded about the process?
- Answers Random variation is suggested and the process is probably in control.
A Type I Error is referred to by what other name? - Answers Alpha Risk
For a mean control chart, when the process standard deviation is not known, what is used in its
place as a measure of process variability? - Answers Average Range
Which of the following are measured using attributes? - Answers Number of defects
Number of calls in a day
When the results of quality control are unacceptable, what is the next step? - Answers corrective
action
Statistical process control is ______. - Answers quality control efforts that occur during
production
What is the best synonym for inspection from the below list? - Answers Appraisal
Inspection during transformation is called what? - Answers process control
What are the basic issues of quality control inspection? (Check all that apply.) - Answers How
much and how often to inspect
At what stage of the process inspection should occur
Where inspection should take place
Whether to inspect attributes or variables
Select the best definition of Quality Control. - Answers A process that measures output relative
to a standard and takes action when discrepancies occur.
Which product characteristics would prompt the most intensive inspection? - Answers Low-
volume, high-cost
Which is/are examples of Acceptance Sampling? (Select all that apply.) - Answers Inspection of
raw material batches before production
Inspection of final assembly lots after production
What are some examples of inspection points in the service sector? (Select all applicable
answers.) - Answers Outgoing patient billing accuracy at medical clinic.
Kitchen cleanliness at fast food restaurant at shift start.
Which of the following statements is/are correct about Inspection? - Answers Inspection
involves checking for conformance against a quality standard.
Inspection can occur before, during or after production.
Which type of inspection occurs before and after production? - Answers acceptance sampling
One basic issue of inspection is what type of data to collect. If we can measure the value of a
characteristic, we are collecting ______ data. - Answers variable
Which of the following statements about inspection frequency are is/are correct? - Answers The
,more lots being produced the more inspections are needed.
A stable process will require less frequent checks than an unstable process.
What are the different inspection points in manufacturing? (Select all correct answers.) -
Answers Raw materials & purchased parts before production
Before a costly, irreversible or covering operation/process.
Finished goods after production
Under which conditions would on-site inspection be better than off-site at a specialized test lab?
- Answers Need for quick inspection results due to delivery schedule
Alteration or contamination of samples during transfer to lab
True or false: In acceptance sampling, a type of quality control inspection, 100% of product in a
given lot are checked for conformance. - Answers false
What is the rationale and basis for statistical process control? - Answers Acceptable variation
within probability limits
Given a stable process, we must ask the question whether the ______ of process output is within
an acceptable range. - Answers inherent variability
Select the best definition of assignable variation. - Answers Special, non-random variation
traceable to a definite cause.
Which scenario would indicate the need for off-site testing at a centralized testing facility? -
Answers Customer specifications for satellite component require dust-free, no vibration test
What is the best definition of statistical process control? - Answers Analyze data from some
point in the process to determine if the process is likely to be in or out of control.
When comparing a sampling to a process distribution, what are the most important things to
note? - Answers They have the same means, are normally distributed, and sampling has less
variability.
Random variation in a process indicates __________; whereas non-random variation indicates
process __________. - Answers stability/instability
What does the central limit theorem tell us about the sampling distribution? - Answers It
approaches a normal distribution as sample size increases.
Select the best definition of random variation. - Answers Common variation inherent in a
process occurring by chance.
What is the first step in the control process? - Answers Define in sufficient detail what is to be
, controlled.
Select the best definition of a control chart. - Answers A time-ordered plot of sample statistics
used to determine randomness or non-randomness.
Which of the following statements is/are correct about the sampling distribution? (Select all
applicable answers) - Answers Sampling distribution is a plot of many sample means.
Sampling distribution is narrower than the process distribution.
When +/- 2 standard deviation control limits are used in a process control chart, which of the
below statements are true? - Answers Approximately 95.5% of the time random data points will
fall within (inside) the upper and lower control limits.
Comparing a theoretical sampling distribution to the process distribution, which of the following
is true? - Answers The sampling distribution curve is narrower than the process distribution.
Which of the following statements about Type I error is/are correct? - Answers A Type I error is
concluding non-randomness and being mistaken.
A Type I error's alpha risk equals the probability (area) in the two "tails."
True or false: In the control process, only those characteristics that can be counted or measured
are candidates for control. - Answers true
What is the difference between variable and attribute data? (Select the best answer.) - Answers
Variable data is measured on a continuous scale and attribute data is counted using discrete
numbers.
In a control chart when a data point falls outside the control limits (upper and lower), what must
be concluded? - Answers The process appears non-random and should be checked.
A mean control chart is used to check ______. - Answers for central tendency of a variable
The "average of the sample means" is also known by what term? - Answers X-double bar
When a sample average falls inside the control limits, what can be concluded about the process?
- Answers Random variation is suggested and the process is probably in control.
A Type I Error is referred to by what other name? - Answers Alpha Risk
For a mean control chart, when the process standard deviation is not known, what is used in its
place as a measure of process variability? - Answers Average Range
Which of the following are measured using attributes? - Answers Number of defects
Number of calls in a day
