Question 1

A malfunctioning valve in a filling machine can create assignable variation.

Accepted Answer

A) True 
 B)False

Question 2

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 3

We construct a p chart to track the ____________________ of defective units in a series of samples.

Accepted Answer

proportion

Question 4

Statistical process control allows us to detect ____________________ variation only.

Accepted Answer

The answer of Statistical process control allows us to detect...

Question 5

In statistical process control,a Type II error occurs if we conclude that the process is in control when it actually isn't.

Accepted Answer

A) True 
 B)False

Question 6

Control limits for the p chart are typically placed so that they are 3 standard errors above and below the centerline.

Accepted Answer

A) True 
 B)False

Question 7

A control chart used to monitor a process whose results are categorized as either defective or nondefective is called a(n)____________________.

Accepted Answer

The answer of A control chart used to monitor a...

Question 8

A production facility produces 75 units per hour and uses an   chart to monitor its quality.The control limits are seat at 2.5 standard errors from the mean.On average,how many units will be produced until the control chart signals that the process is out of control,when it is in fact under control?

Accepted Answer

Since P = P (| z | > 2.5)= .01

Question 9

40 Samples Production 
​ The mean of the sample means and the pooled standard deviation of 40 samples of size 8 taken from a production process under control are   ,and S = 14.5,respectively. ​ ​
-{40 Samples Production Narrative} Compute the zone boundaries for the   chart.

Accepted Answer

-------------------------- 
@#IMG-DLM& 
A --------

Question 10

The   chart helps with questions about whether the process is producing the correct or acceptable mean.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following elements affects the chance of making a Type II error?

Accepted Answer

A) The sample size. 
B) The mean of the process. 
C) The chance of making a Type I error. 
D) All of these choices are true. 
A) The sample size. 
B) The mean of the process. 
C) The chance of making a Type I error. 
D) All of these choices are true.

Question 12

An   chart for a normally distributed random variable has control limits set at ±3 standard errors from the centerline.One sample mean falls outside the control limits when the process is actually under control.The probability that this happened by chance is:

Accepted Answer

A) .997 
B) .500 
C) .050 
D) .003 
A) .997 
B) .500 
C) .050 
D) .003

Question 13

Assume that the control limits of an   chart are defined as 2 standard errors above and below the centerline.Calculate the probability that a sample mean falls outside the control limits when the process is in fact under control.

Accepted Answer

P = P (| z | > 2)= P

Question 14

Chance variation ____________________ product quality and ____________________ costs.

Accepted Answer

decreases;

Question 15

What is the average run length (ARL)until an   control chart signals a false alarm if the control limits are set at ±3 standard errors from the centerline?

Accepted Answer

In this case the probability o

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

25 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   ,and S = 3.5,respectively.The sample means are listed below.   ​ ​
-{25 Samples Production Narrative} Plot the sample means on the   chart.

Accepted Answer

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

Question 18

A trend indicates there is a slow and steady shift in the ____________________ of a process distribution.

Accepted Answer

The answer of A trend indicates there is a slow...

Question 19

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.

Question 20

Control charts for variables are appropriate whenever we are interested in monitoring measurements,such as weights,diameters,or temperature.

Accepted Answer

A) True 
 B)False

Exam 21: Statistical Process Control

A malfunctioning valve in a filling machine can create assignable variation.

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

We construct a p chart to track the ____________________ of defective units in a series of samples.

Statistical process control allows us to detect ____________________ variation only.

In statistical process control,a Type II error occurs if we conclude that the process is in control when it actually isn't.

Control limits for the p chart are typically placed so that they are 3 standard errors above and below the centerline.

A control chart used to monitor a process whose results are categorized as either defective or nondefective is called a(n)____________________.

A production facility produces 75 units per hour and uses an chart to monitor its quality.The control limits are seat at 2.5 standard errors from the mean.On average,how many units will be produced until the control chart signals that the process is out of control,when it is in fact under control?

40 Samples Production ​ The mean of the sample means and the pooled standard deviation of 40 samples of size 8 taken from a production process under control are ,and S = 14.5,respectively. ​ ​ -{40 Samples Production Narrative} Compute the zone boundaries for the chart.

The chart helps with questions about whether the process is producing the correct or acceptable mean.

Which of the following elements affects the chance of making a Type II error?

An chart for a normally distributed random variable has control limits set at ±3 standard errors from the centerline.One sample mean falls outside the control limits when the process is actually under control.The probability that this happened by chance is:

Assume that the control limits of an chart are defined as 2 standard errors above and below the centerline.Calculate the probability that a sample mean falls outside the control limits when the process is in fact under control.

Chance variation ____________________ product quality and ____________________ costs.

What is the average run length (ARL)until an control chart signals a false alarm if the control limits are set at ±3 standard errors from the centerline?

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

25 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 ,and S = 3.5,respectively.The sample means are listed below. ​ ​ -{25 Samples Production Narrative} Plot the sample means on the chart.

A trend indicates there is a slow and steady shift in the ____________________ of a process distribution.

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

Control charts for variables are appropriate whenever we are interested in monitoring measurements,such as weights,diameters,or temperature.

What Is Statistics

Graphical Descriptive Techniques 1

Graphical Descriptive Techniques 2

Numerical Descriptive Techniques

Data Collection and Sampling

Probability

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

Simple Linear Regression and Correlation

Multiple Regression

Model Building

Nonparametric Statistics

Time-Series Analytics and Forecasting

Decision Analysis

Conclusion

Filters

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.

40 Samples Production The mean of the sample means and the pooled standard deviation of 40 samples of size 8 taken from a production process under control are ,and S = 14.5,respectively. -{40 Samples Production Narrative} Compute the zone boundaries for the chart.

Chance variation product quality and costs.

25 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 ,and S = 3.5,respectively.The sample means are listed below. -{25 Samples Production Narrative} Plot the sample means on the chart.