Question 1

One purpose of quality control is to reduce the costs associated with producing and delivering poor quality goods and services.

Accepted Answer

A) True 
 B)False

Question 2

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples,ΣX = 15,350 and ΣR = 411.4. To construct a range chart,what is the LCL for the range?

Accepted Answer

A) 602.004 
B) 411.400 
C) 625.666 
D) 0.000 
A) 602.004 
B) 411.400 
C) 625.666 
D) 0.000

Question 3

The Quality Assurance Department selected a sample of 12 printed circuit boards and tested them. The number of defects in each circuit board was 3,3,0,5,1,1,5,6,6,2,0,and 1. What kind of control chart should be constructed to monitor the process?

Accepted Answer

A) Mean chart 
B) Range chart 
C) Percent defective chart 
D) c-bar chart 
A) Mean chart 
B) Range chart 
C) Percent defective chart 
D) c-bar chart

Question 4

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results:   What is the upper control limit (UCL)for the mean?

Accepted Answer

A) 6.738 
B) 6.999 
C) 6.779 
D) 7.221 
A) 6.738 
B) 6.999 
C) 6.779 
D) 7.221

Question 5

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results:   What is the value of the lower control factor of the range?

Accepted Answer

A) 0 
B) 2.115 
C) 2.004 
D) 3.0 
A) 0 
B) 2.115 
C) 2.004 
D) 3.0

Question 6

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. The last five sample means show a trend of increasing sample means. The process is ________.

Accepted Answer

A) out of control 
B) in control 
C) improving 
D) showing chance variation 
A) out of control 
B) in control 
C) improving 
D) showing chance variation

Question 7

A fishbone diagram is used to determine if a process is out of control.

Accepted Answer

A) True 
 B)False

Question 8

Mean charts are designed to determine whether a process is in or out of control based on sample means.

Accepted Answer

A) True 
 B)False

Question 9

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples,ΣX = 15,350 and ΣR = 411.4. To construct a range chart,what is the UCL for the range?

Accepted Answer

A) 37.553 
B) 411.400 
C) 0.000 
D) 102.850 
A) 37.553 
B) 411.400 
C) 0.000 
D) 102.850

Question 10

Control charts are used to determine if a process is ________.

Accepted Answer

A) in or out of control 
B) measurable 
C) fixable 
D) testable 
A) in or out of control 
B) measurable 
C) fixable 
D) testable

Question 11

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results:   What is the mean range?

Accepted Answer

A) 0.000 
B) 0.160 
C) 0.080 
D) 0.203 
A) 0.000 
B) 0.160 
C) 0.080 
D) 0.203

Question 12

In acceptance sampling,the risk of accepting a poor-quality lot is known as ________.

Accepted Answer

A) consumer's risk 
B) producer's risk 
C) a Type I error 
D) none of these answers is correct 
A) consumer's risk 
B) producer's risk 
C) a Type I error 
D) none of these answers is correct

Question 13

Random samples of four items are selected from a manufacturing process at regular intervals,and a certain quality characteristic is measured. After 25 samples,ΣX = 15,350 and ΣR = 411.4. To construct a mean chart,what is the value for the centerline?

Accepted Answer

A) 15,350 
B) 614 
C) 411.4 
D) 3837.5 
A) 15,350 
B) 614 
C) 411.4 
D) 3837.5

Question 14

The purpose of a statistical quality control chart is to identify when assignable causes of variation have entered the production system so that the cause may be identified and corrected.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following statements about causes of variation are true? 
I. Assignable variation is random in nature and cannot be eliminated or reduced.
II. Chance variation cannot be completely eliminated unless there are significant methods,techniques,or equipment used in the process.
III. Chance variation usually cannot be corrected,while assignable variation is correctable.

Accepted Answer

A) I only 
B) II only 
C) II and III 
D) I and III 
A) I only 
B) II only 
C) II and III 
D) I and III

Question 16

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. The last 50 sample means are randomly distributed between the upper and lower control limits. The process is ________.

Accepted Answer

A) out of control 
B) in control 
C) improving 
D) showing assignable variation 
A) out of control 
B) in control 
C) improving 
D) showing assignable variation

Question 17

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results:   What is the range of the samples at 4 pm?

Accepted Answer

A) 0.05 
B) 0.06 
C) 0.11 
D) 0.12 
A) 0.05 
B) 0.06 
C) 0.11 
D) 0.12

Question 18

In acceptance sampling,there is one unique operating characteristic curve for a specified sampling plan.

Accepted Answer

A) True 
 B)False

Question 19

A large restaurant contracts with a local laundry to wash white napkins. The laundry returns the napkins in bundles of 100 napkins. The restaurant randomly samples 10 napkins to make sure that the napkins are clean with no stains or other defects. The restaurant is using a method called ________.

Accepted Answer

A) statistical process control 
B) fishbone analysis 
C) Pareto analysis 
D) acceptance sampling 
A) statistical process control 
B) fishbone analysis 
C) Pareto analysis 
D) acceptance sampling

Question 20

Which probability distribution is used to develop a percent defective chart?

Accepted Answer

A) Normal distribution 
B) Chi-square distribution 
C) Poisson distribution 
D) Binomial distribution 
A) Normal distribution 
B) Chi-square distribution 
C) Poisson distribution 
D) Binomial distribution

One purpose of quality control is to reduce the costs associated with producing and delivering poor quality goods and services.

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples,ΣX = 15,350 and ΣR = 411.4. To construct a range chart,what is the LCL for the range?

The Quality Assurance Department selected a sample of 12 printed circuit boards and tested them. The number of defects in each circuit board was 3,3,0,5,1,1,5,6,6,2,0,and 1. What kind of control chart should be constructed to monitor the process?

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results: What is the upper control limit (UCL)for the mean?

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results: What is the value of the lower control factor of the range?

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. The last five sample means show a trend of increasing sample means. The process is ________.

A fishbone diagram is used to determine if a process is out of control.

Mean charts are designed to determine whether a process is in or out of control based on sample means.

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples,ΣX = 15,350 and ΣR = 411.4. To construct a range chart,what is the UCL for the range?

Control charts are used to determine if a process is ________.

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results: What is the mean range?

In acceptance sampling,the risk of accepting a poor-quality lot is known as ________.

Random samples of four items are selected from a manufacturing process at regular intervals,and a certain quality characteristic is measured. After 25 samples,ΣX = 15,350 and ΣR = 411.4. To construct a mean chart,what is the value for the centerline?

The purpose of a statistical quality control chart is to identify when assignable causes of variation have entered the production system so that the cause may be identified and corrected.

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. The last 50 sample means are randomly distributed between the upper and lower control limits. The process is ________.

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results: What is the range of the samples at 4 pm?

In acceptance sampling,there is one unique operating characteristic curve for a specified sampling plan.

A large restaurant contracts with a local laundry to wash white napkins. The laundry returns the napkins in bundles of 100 napkins. The restaurant randomly samples 10 napkins to make sure that the napkins are clean with no stains or other defects. The restaurant is using a method called ________.

Which probability distribution is used to develop a percent defective chart?

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Nonparametric Methods: Nominal Level Hypothesis Tests

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Time Series and Forecasting

An Introduction to Decision Theory

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Exam 19: Statistical Process Control and Quality Management

One purpose of quality control is to reduce the costs associated with producing and delivering poor quality goods and services.

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples,ΣX = 15,350 and ΣR = 411.4. To construct a range chart,what is the LCL for the range?

The Quality Assurance Department selected a sample of 12 printed circuit boards and tested them. The number of defects in each circuit board was 3,3,0,5,1,1,5,6,6,2,0,and 1. What kind of control chart should be constructed to monitor the process?

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results: What is the upper control limit (UCL)for the mean?

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results: What is the value of the lower control factor of the range?

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. The last five sample means show a trend of increasing sample means. The process is ________.

A fishbone diagram is used to determine if a process is out of control.

Mean charts are designed to determine whether a process is in or out of control based on sample means.

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples,ΣX = 15,350 and ΣR = 411.4. To construct a range chart,what is the UCL for the range?

Control charts are used to determine if a process is ________.

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results: What is the mean range?

In acceptance sampling,the risk of accepting a poor-quality lot is known as ________.

Random samples of four items are selected from a manufacturing process at regular intervals,and a certain quality characteristic is measured. After 25 samples,ΣX = 15,350 and ΣR = 411.4. To construct a mean chart,what is the value for the centerline?

The purpose of a statistical quality control chart is to identify when assignable causes of variation have entered the production system so that the cause may be identified and corrected.

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. The last 50 sample means are randomly distributed between the upper and lower control limits. The process is ________.

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then,once the machine is running,a sample of six tubes is taken every three hours and weighed with the following results: What is the range of the samples at 4 pm?

In acceptance sampling,there is one unique operating characteristic curve for a specified sampling plan.

A large restaurant contracts with a local laundry to wash white napkins. The laundry returns the napkins in bundles of 100 napkins. The restaurant randomly samples 10 napkins to make sure that the napkins are clean with no stains or other defects. The restaurant is using a method called ________.

Which probability distribution is used to develop a percent defective chart?

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Nonparametric Methods: Nominal Level Hypothesis Tests

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Time Series and Forecasting

An Introduction to Decision Theory

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