Question 1

Which of the following is most likely the cause of a level shift in a SPC chart?

Accepted Answer

A)  Tool wear 
B)  A new worker 
C)  Temperature fluctuations 
D)  Alternating samples from two machines 
A)  Tool wear 
B)  A new worker 
C)  Temperature fluctuations 
D)  Alternating samples from two machines B

Question 2

A p-chart is a type of process control chart that can be used for plotting the proportion of nonconforming sampled items.

Accepted Answer

A) True 
 B)False  True

Question 3

If you increase the size of the samples taken when using an   chart,it is necessary to recalculate your control limits because the limits will be wider.

Accepted Answer

A) True 
 B)False  False

Question 4

Professor Murphy wants to set up a control chart to monitor the percentage of absenteeism in his introductory statistics course (50 students are registered).Absences per period for the last 15 class sessions are in the table below.   Using 3 sigma limits,calculate lower and upper control limits for a p-chart to track absences.

Accepted Answer

A)  0,.252 
B)  0,.175 
C)  0,.114 
D)  -0.038,.272 
A)  0,.252 
B)  0,.175 
C)  0,.114 
D)  -0.038,.272

Question 5

If USL = 550,LSL = 540,μ = 545,and σ = 1.75,the process is highly capable.

Accepted Answer

A) True 
 B)False

Question 6

Statistical process control charts (SPC charts)are attributed to Shewhart.

Accepted Answer

A) True 
 B)False

Question 7

A slow drift of measurements either up or down from the process centerline suggests a:

Accepted Answer

A)  mixed process. 
B)  trend. 
C)  instability. 
D)  cycle. 
A)  mixed process. 
B)  trend. 
C)  instability. 
D)  cycle.

Question 8

Find the Cpk index for a process with USL = 550,LSL = 540,μ = 545,and σ = 0.75.

Accepted Answer

A)  1.33 
B)  2.22 
C)  1.25 
D)  1.75 
A)  1.33 
B)  2.22 
C)  1.25 
D)  1.75

Question 9

A c-chart is based on the Poisson distribution.

Accepted Answer

A) True 
 B)False

Question 10

Which is a rule of thumb to indicate an out-of-control process on the   chart?

Accepted Answer

A)  Single point outside one sigma 
B)  Two of three successive points outside one sigma on the same side of the centerline 
C)  Four of five successive points on the same side of the centerline 
D)  Nine successive points alternating in sign 
A)  Single point outside one sigma 
B)  Two of three successive points outside one sigma on the same side of the centerline 
C)  Four of five successive points on the same side of the centerline 
D)  Nine successive points alternating in sign

Question 11

Ten samples of n = 5 were collected to construct an   chart.The sample mean and range for each sample are shown in the table below.   Calculate the empirical lower and upper control limits for the   chart (you will need a table of control chart factors).

Accepted Answer

A)  196.46,217.34 
B)  171.81,241.39 
C)  188.03,225.17 
D)  163.64,250.56 
A)  196.46,217.34 
B)  171.81,241.39 
C)  188.03,225.17 
D)  163.64,250.56

Question 12

If the specification subgroup size is n = 4 and the known process parameters are μ = 2.75 and σ = .044,the control limits for the   chart will be:

Accepted Answer

A)  LCL = 2.684,UCL = 2.816. 
B)  LCL = 2.728,UCL = 2.772. 
C)  LCL = 2.618,UCL = 2.882. 
D)  LCL = 2.518,UCL = 2.998. 
A)  LCL = 2.684,UCL = 2.816. 
B)  LCL = 2.728,UCL = 2.772. 
C)  LCL = 2.618,UCL = 2.882. 
D)  LCL = 2.518,UCL = 2.998.

Question 13

Ten samples of n = 5 were collected to construct an   chart.The sample mean and range for each sample are shown in the table below.   Calculate empirical lower and upper control limits for the R chart (you will need a table of control chart factors).

Accepted Answer

A)  0,45.86 
B)  0,42.49 
C)  0,38.26 
D)  4.48,35.58 
A)  0,45.86 
B)  0,42.49 
C)  0,38.26 
D)  4.48,35.58

Question 14

What does the fourth letter mean in the Six-Sigma DMAIC acronym?

Accepted Answer

A)  Integrate 
B)  Investigate 
C)  Improve 
D)  Interact 
A)  Integrate 
B)  Investigate 
C)  Improve 
D)  Interact

Question 15

Which is not a true statement about the life and philosophy of W.Edwards Deming?

Accepted Answer

A)  He taught quality control techniques to Japanese companies during the 1950s. 
B)  He lived a very long life and was a highly paid consultant past age 80. 
C)  He invented control charts and proposed the ISO 9000 standard. 
D)  He believed that poor quality is not primarily the fault of the workers. 
A)  He taught quality control techniques to Japanese companies during the 1950s. 
B)  He lived a very long life and was a highly paid consultant past age 80. 
C)  He invented control charts and proposed the ISO 9000 standard. 
D)  He believed that poor quality is not primarily the fault of the workers.

Question 16

The Cp index equals the Cpk index if USL = 550,LSL = 540,μ = 543,and σ = 0.75.

Accepted Answer

A) True 
 B)False

Question 17

Statistical process control charts can measure:

Accepted Answer

A)  the stability of the process. 
B)  the capability of a process. 
C)  both stability and capability. 
A)  the stability of the process. 
B)  the capability of a process. 
C)  both stability and capability.

Question 18

ISO 9000 specifies quality processes rather than defect rates.

Accepted Answer

A) True 
 B)False

Question 19

In manufacturing,if workers readjust the equipment after each sample,it would typically:

Accepted Answer

A)  increase variation. 
B)  decrease variation. 
C)  widen the specification limits. 
D)  improve conformance to specifications. 
A)  increase variation. 
B)  decrease variation. 
C)  widen the specification limits. 
D)  improve conformance to specifications.

Question 20

Which is not a tool of statistical quality control?

Accepted Answer

A)  Fishbone diagram 
B)  Pareto chart 
C)  Attribute control chart 
D)  Deming chart 
A)  Fishbone diagram 
B)  Pareto chart 
C)  Attribute control chart 
D)  Deming chart

Which of the following is most likely the cause of a level shift in a SPC chart?

A p-chart is a type of process control chart that can be used for plotting the proportion of nonconforming sampled items.

If you increase the size of the samples taken when using an chart,it is necessary to recalculate your control limits because the limits will be wider.

If USL = 550,LSL = 540,μ = 545,and σ = 1.75,the process is highly capable.

Statistical process control charts (SPC charts)are attributed to Shewhart.

A slow drift of measurements either up or down from the process centerline suggests a:

Find the C_pk index for a process with USL = 550,LSL = 540,μ = 545,and σ = 0.75.

A c-chart is based on the Poisson distribution.

Which is a rule of thumb to indicate an out-of-control process on the chart?

Ten samples of n = 5 were collected to construct an chart.The sample mean and range for each sample are shown in the table below. Calculate the empirical lower and upper control limits for the chart (you will need a table of control chart factors).

If the specification subgroup size is n = 4 and the known process parameters are μ = 2.75 and σ = .044,the control limits for the chart will be:

Ten samples of n = 5 were collected to construct an chart.The sample mean and range for each sample are shown in the table below. Calculate empirical lower and upper control limits for the R chart (you will need a table of control chart factors).

What does the fourth letter mean in the Six-Sigma DMAIC acronym?

Which is not a true statement about the life and philosophy of W.Edwards Deming?

The C_p index equals the C_pk index if USL = 550,LSL = 540,μ = 543,and σ = 0.75.

Statistical process control charts can measure:

ISO 9000 specifies quality processes rather than defect rates.

In manufacturing,if workers readjust the equipment after each sample,it would typically:

Which is not a tool of statistical quality control?

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time-Series Analysis

Chi-Square Tests

Nonparametric Tests

Filters

Exam 17: Quality Management

Which of the following is most likely the cause of a level shift in a SPC chart?

A p-chart is a type of process control chart that can be used for plotting the proportion of nonconforming sampled items.

If you increase the size of the samples taken when using an chart,it is necessary to recalculate your control limits because the limits will be wider.

If USL = 550,LSL = 540,μ = 545,and σ = 1.75,the process is highly capable.

Statistical process control charts (SPC charts)are attributed to Shewhart.

A slow drift of measurements either up or down from the process centerline suggests a:

Find the Cpk index for a process with USL = 550,LSL = 540,μ = 545,and σ = 0.75.

A c-chart is based on the Poisson distribution.

Which is a rule of thumb to indicate an out-of-control process on the chart?

Ten samples of n = 5 were collected to construct an chart.The sample mean and range for each sample are shown in the table below. Calculate the empirical lower and upper control limits for the chart (you will need a table of control chart factors).

If the specification subgroup size is n = 4 and the known process parameters are μ = 2.75 and σ = .044,the control limits for the chart will be:

Ten samples of n = 5 were collected to construct an chart.The sample mean and range for each sample are shown in the table below. Calculate empirical lower and upper control limits for the R chart (you will need a table of control chart factors).

What does the fourth letter mean in the Six-Sigma DMAIC acronym?

Which is not a true statement about the life and philosophy of W.Edwards Deming?

The Cp index equals the Cpk index if USL = 550,LSL = 540,μ = 543,and σ = 0.75.

Statistical process control charts can measure:

ISO 9000 specifies quality processes rather than defect rates.

In manufacturing,if workers readjust the equipment after each sample,it would typically:

Which is not a tool of statistical quality control?

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time-Series Analysis

Chi-Square Tests

Nonparametric Tests

Filters

Find the C_pk index for a process with USL = 550,LSL = 540,μ = 545,and σ = 0.75.

The C_p index equals the C_pk index if USL = 550,LSL = 540,μ = 543,and σ = 0.75.