Question 1

To construct a p chart,draw samples of size n,and for each sample calculate the sample ____________________ of defective units.

Accepted Answer

proportion

Question 2

Assignable variation is caused by specific events or factors that are frequently temporary.

Accepted Answer

A) True 
 B)False

Question 3

Sample proportions that are ____________________ than the lower control limit of a p chart indicate a change in the process that we would like to keep.

Accepted Answer

The answer of Sample proportions that are ____________________ than the...

Question 4

The mean of the sample means and the pooled standard deviation of 50 samples of size 10 taken from a production process under control are found to be 225 and 16,respectively.The upper control limit for the $\bar { x }$ chart is:

Accepted Answer

A)  231.79 
B)  240.18 
C)  218.21 
D)  209.82 
A)  231.79 
B)  240.18 
C)  218.21 
D)  209.82

Question 5

Samples Production
Thirty samples of size 4 were drawn from a production process.The data are shown below.
  
-{30 Samples Production Narrative} Calculate the mean and standard deviation of each sample.

Accepted Answer

The answer of Samples Production
Thirty samples of size 4 were...

Question 6

Samples Production
25 samples of size 4 were taken from a manufacturing process.The mean of the sample means and the pooled standard deviation are $\bar{\bar { x }} = 13.9$ ,and S = 3.5,respectively.The sample means are listed below.
  
-{25 Samples Production Narrative} Plot the sample means on the $\bar { x }$ chart.

Accepted Answer

The answer of Samples Production
25 samples of size 4 were...

Question 7

If the lower control limit of a p chart is negative,set it equal to ____________________.

Accepted Answer

The answer of If the lower control limit of a...

Question 8

____________________ variation is caused by specific events or factors that are frequently temporary.

Accepted Answer

The answer of ____________________ variation is caused by specific events...

Question 9

If a control chart finds six increasing or six decreasing points in a row,this is an example of assignable cause variation called a(n)____________________.

Accepted Answer

The answer of If a control chart finds six increasing...

Question 10

A process capability index Cp of 1.0 describes a production where the difference in the specification limits is equal to 6 standard errors.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following process results indicate that a statistical process is out of control?

Accepted Answer

A)  A repeated series of small observations followed by large observations. 
B)  An increase in the standard deviation. 
C)  A slow and steady shift (up or down)in the process distribution mean. 
D)  All of these choices are true. 
A)  A repeated series of small observations followed by large observations. 
B)  An increase in the standard deviation. 
C)  A slow and steady shift (up or down)in the process distribution mean. 
D)  All of these choices are true.

Question 12

If a control chart finds the standard deviation in the means is increasing,this could be an indicator of assignable variation called ____________________.

Accepted Answer

The answer of If a control chart finds the standard...

Question 13

Assume a process has limits set at $\pm$3 standard errors from the centerline.The average run length (ARL)is 385.What does this mean?

Accepted Answer

When the process is under control,the @#LAT-DLM& c

Question 14

Diaper Delivery
Wrap-M-Up,a Ft.Lauderdale diaper Service,has 10 delivery men who each deliver diapers to 50 customers every day.Wrap-M-Up decides to record the proportion of diapers delivered on time for a 10-day period and construct a p chart to see whether the proportion is too erratic.The data are shown below:
 $$\begin{array} { | l | c c c c c c c c c c | } 
\hline \text { Day } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \
\hline \text { Prapartion of Dingers } & .916 & .894 & .928 & .900 & .864 & .968 & .914 & .988 & .952 & .936 \
\text { Delivered an Time } & & & & & & & & & & \
\hline
\end{array}$$
-{Diaper Delivery Narrative} Find the numerical value of the upper control limit for the p chart.

Accepted Answer

The answer of Diaper Delivery
Wrap-M-Up,a Ft.Lauderdale diaper Service,has 10 delivery...

Question 15

If a control chart finds fourteen points in a row that are alternating up and down,this is an example of assignable variation called a(n)____________________.

Accepted Answer

The answer of If a control chart finds fourteen points...

Question 16

If the lower control limit for the p chart is negative,we set it equal to

Accepted Answer

A)  2 
B)  1 
C)  0 
D)  None of these choices. 
A)  2 
B)  1 
C)  0 
D)  None of these choices.

Question 17

The letter p in p chart stands for ____________________.

Accepted Answer

The answer of The letter p in p chart stands...

Question 18

A level shift is a change in the ____________________ of the process distribution.

Accepted Answer

The answer of A level shift is a change in...

Question 19

Chance variation was built into the produce when the production process was first set up.

Accepted Answer

A) True 
 B)False

Question 20

To determine whether the process distribution standard deviation has changed,we use a(n):

Accepted Answer

A)  chart. 
B)  S chart. 
C)  p chart. 
D)  All of these choices are true. 
A)  chart. 
B)  S chart. 
C)  p chart. 
D)  All of these choices are true.

Exam 21: Statistical Process Control

To construct a p chart,draw samples of size n,and for each sample calculate the sample ____________________ of defective units.

Assignable variation is caused by specific events or factors that are frequently temporary.

Sample proportions that are ____________________ than the lower control limit of a p chart indicate a change in the process that we would like to keep.

The mean of the sample means and the pooled standard deviation of 50 samples of size 10 taken from a production process under control are found to be 225 and 16,respectively.The upper control limit for the xˉ\bar { x }xˉ chart is:

Samples Production Thirty samples of size 4 were drawn from a production process.The data are shown below. -{30 Samples Production Narrative} Calculate the mean and standard deviation of each sample.

If the lower control limit of a p chart is negative,set it equal to ____________________.

____________________ variation is caused by specific events or factors that are frequently temporary.

If a control chart finds six increasing or six decreasing points in a row,this is an example of assignable cause variation called a(n)____________________.

A process capability index Cp of 1.0 describes a production where the difference in the specification limits is equal to 6 standard errors.

Which of the following process results indicate that a statistical process is out of control?

If a control chart finds the standard deviation in the means is increasing,this could be an indicator of assignable variation called ____________________.

Assume a process has limits set at ±\pm± 3 standard errors from the centerline.The average run length (ARL)is 385.What does this mean?

If a control chart finds fourteen points in a row that are alternating up and down,this is an example of assignable variation called a(n)____________________.

If the lower control limit for the p chart is negative,we set it equal to

The letter p in p chart stands for ____________________.

A level shift is a change in the ____________________ of the process distribution.

Chance variation was built into the produce when the production process was first set up.

To determine whether the process distribution standard deviation has changed,we use a(n):

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

A: Numerical Descriptive Techniques

B: Numerical Descriptive Techniques

C: Numerical Descriptive Techniques

Data Collection and Sampling

Probability

A: Random Variables and Discrete Probability Distributions

B: Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests

A: Simple Linear Regression and Correlation

B: Simple Linear Regression and Correlation

Multiple Regression

Model Building

Nonparametric Statistics

Time-Series Analysis and Forecasting

Decision Analysis

Conclusion

Filters

The mean of the sample means and the pooled standard deviation of 50 samples of size 10 taken from a production process under control are found to be 225 and 16,respectively.The upper control limit for the $\bar { x }$ chart is:

A process capability index C_p of 1.0 describes a production where the difference in the specification limits is equal to 6 standard errors.

Assume a process has limits set at $\pm$ 3 standard errors from the centerline.The average run length (ARL)is 385.What does this mean?