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ASQ Study Questions with Detailed
Verified Answers
Which of the following is a disadvantage of pre-control charts?
a. They do not provide information on how to reduce variability in a
process.
b. They cannot determine if a product being produced is centered between
the tolerances during initial operation setup.
c. They are difficult to interpret.
d. They can be used for processes with a capability ratio less than 1.
⼀Answer:- (A)
Pre-control charts do not provide information on how variability can be
reduced or how to bring a process into control. They should only be used
for processes with a capability ration greater than one. Poor capability in a
pre-control chart will indicate that assignable causes are present when in
fact there are no assignable causes of variation. Small sample sizes in a
pre-control chart will reduce the cart's ability to detect moderate to large
shifts. Pre-control charts are useful in initial setup operations to determine
whether a process is centered between the tolerances.
Which of the following is considered attribute data?
a. Customer wait time
b. Number of filing errors
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c. Costs of processing applications
d. Thickness of a component
⼀Answer:- (B)
Attribute data is the term used to describe discrete data in quality control.
Wait time, processing costs, and thickness can each be measured on a
continuous scale. The number of filing errors can only take on a countable
set of numbers, and is considered discrete, or attribute, data.
A population. has a distribution with a mean 24 and standard deviation 5.5.
What is the approximate standard deviation of the sampling distribution of
the sample mean if random samples of size 32 are taken?
a. 5.5
b . 5.5/32
c. 5.5/√24
d . 5.5/√32
⼀Answer:- (D)
The central limit theorem states that if the sample size n is sufficiently
large, then the sample mean x follows approximately a normal distribution
with mean μ↓x = μ and standard deviation σ↓x = σ/√n.
In this case, μ = 24, σ = 5.5 and n = 32. Therefore, σ↓x = 5.5/√32
A control chart monitoring the viscosity of a product shows that a particular
process is out of control. What should the process operator do?
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a. Attempt to fix the problem on their own.
b. Follow the reaction plan detailed in the control plan of the process.
c. Brainstorm to determine the cause of the problem.
d. Nothing; the process will stabilize on its own.
⼀Answer:- (B)
Control plans include detailed reaction plans that should be followed when
the control method detects a problem in the process. The reaction plan
details the steps the operator should take when the process has a problem
.
An x and R chart was prepared for an operation using 25 samples with four
pieces in each sample. x was found to be 26.75 and R¯ was 8.10. During
production, a sample of four was taken and the pieces measured 20, 29, 40,
and 25. At the time this sample was taken
a. both the average and range were within the control limits.
b. neither the average nor range were within the control limits.
c. only the average was outside the control limits.
d. only the range was outside the control limits.
(R¯ is R with a bar on top)
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⼀Answer:- (D)
https://docs.google.com/document/d/1n4TBe4uMD4IjlaTu0g31oHdZweue
cVrXqgHt2ClUdck/edit?usp=sharing
Suppose that the p-value of a hypothesis test on μ1 - μ2 is 0.23. What
conclusions can be made (use significance level 10%)?
a. Reject Ho, conclude that the two means are the same.
b. Reject Ho, conclude that the two means are not the same.
c. Do not reject Ho, Conclude that the two means are the same.
process.
d. Do not reject Ho, Conclude that the two means are not the same.
⼀Answer:- (C)
𝛼 = 0.10 and p-value = 0.23. Using the p-value approach to hypothesis
testing, if the p-value < 𝛼, we do not reject Ho. Since 0.23 > 0.10, we do not
reject Ho and conclude that the two means are the same.
Which phase of the corrective action cycle helps prevent problem backsliding?
a. Problem identification
b. Correction
c. Recurrence control
d. Effectiveness assessment
ASQ Study Questions with Detailed
Verified Answers
Which of the following is a disadvantage of pre-control charts?
a. They do not provide information on how to reduce variability in a
process.
b. They cannot determine if a product being produced is centered between
the tolerances during initial operation setup.
c. They are difficult to interpret.
d. They can be used for processes with a capability ratio less than 1.
⼀Answer:- (A)
Pre-control charts do not provide information on how variability can be
reduced or how to bring a process into control. They should only be used
for processes with a capability ration greater than one. Poor capability in a
pre-control chart will indicate that assignable causes are present when in
fact there are no assignable causes of variation. Small sample sizes in a
pre-control chart will reduce the cart's ability to detect moderate to large
shifts. Pre-control charts are useful in initial setup operations to determine
whether a process is centered between the tolerances.
Which of the following is considered attribute data?
a. Customer wait time
b. Number of filing errors
, Page | 2
c. Costs of processing applications
d. Thickness of a component
⼀Answer:- (B)
Attribute data is the term used to describe discrete data in quality control.
Wait time, processing costs, and thickness can each be measured on a
continuous scale. The number of filing errors can only take on a countable
set of numbers, and is considered discrete, or attribute, data.
A population. has a distribution with a mean 24 and standard deviation 5.5.
What is the approximate standard deviation of the sampling distribution of
the sample mean if random samples of size 32 are taken?
a. 5.5
b . 5.5/32
c. 5.5/√24
d . 5.5/√32
⼀Answer:- (D)
The central limit theorem states that if the sample size n is sufficiently
large, then the sample mean x follows approximately a normal distribution
with mean μ↓x = μ and standard deviation σ↓x = σ/√n.
In this case, μ = 24, σ = 5.5 and n = 32. Therefore, σ↓x = 5.5/√32
A control chart monitoring the viscosity of a product shows that a particular
process is out of control. What should the process operator do?
, Page | 3
a. Attempt to fix the problem on their own.
b. Follow the reaction plan detailed in the control plan of the process.
c. Brainstorm to determine the cause of the problem.
d. Nothing; the process will stabilize on its own.
⼀Answer:- (B)
Control plans include detailed reaction plans that should be followed when
the control method detects a problem in the process. The reaction plan
details the steps the operator should take when the process has a problem
.
An x and R chart was prepared for an operation using 25 samples with four
pieces in each sample. x was found to be 26.75 and R¯ was 8.10. During
production, a sample of four was taken and the pieces measured 20, 29, 40,
and 25. At the time this sample was taken
a. both the average and range were within the control limits.
b. neither the average nor range were within the control limits.
c. only the average was outside the control limits.
d. only the range was outside the control limits.
(R¯ is R with a bar on top)
, Page | 4
⼀Answer:- (D)
https://docs.google.com/document/d/1n4TBe4uMD4IjlaTu0g31oHdZweue
cVrXqgHt2ClUdck/edit?usp=sharing
Suppose that the p-value of a hypothesis test on μ1 - μ2 is 0.23. What
conclusions can be made (use significance level 10%)?
a. Reject Ho, conclude that the two means are the same.
b. Reject Ho, conclude that the two means are not the same.
c. Do not reject Ho, Conclude that the two means are the same.
process.
d. Do not reject Ho, Conclude that the two means are not the same.
⼀Answer:- (C)
𝛼 = 0.10 and p-value = 0.23. Using the p-value approach to hypothesis
testing, if the p-value < 𝛼, we do not reject Ho. Since 0.23 > 0.10, we do not
reject Ho and conclude that the two means are the same.
Which phase of the corrective action cycle helps prevent problem backsliding?
a. Problem identification
b. Correction
c. Recurrence control
d. Effectiveness assessment
