Question 1

A system governed only by common cause variation is a system that:

Accepted Answer

A) ensures high productivity. 
B) is stable. 
C) meets a customer's quality specifications. 
D) has zero natural variation. 
A) ensures high productivity. 
B) is stable. 
C) meets a customer's quality specifications. 
D) has zero natural variation.

Question 2

All else being equal,as the confidence interval increases,the confidence level increases.

Accepted Answer

A) True 
 B)False

Question 3

Deming's Funnel Experiment illustrates that people can and do create unwanted process variation by indiscriminately trying to remove common-cause variation.

Accepted Answer

A) True 
 B)False

Question 4

According to Deming,the analysis of a static population is called:

Accepted Answer

A) analytic study. 
B) statistical inference. 
C) dynamic study. 
D) enumerative study. 
A) analytic study. 
B) statistical inference. 
C) dynamic study. 
D) enumerative study.

Question 5

An experiment that evaluates the effect of two temperatures (200 and 400 degrees)and two reaction times (50 and 100 minutes)on process yield has ___ possible combinations to test.

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
A) 2 
B) 4 
C) 6 
D) 8

Question 6

In a binomial distribution,
 
What does "x" stand for?

Accepted Answer

A) Probability of success 
B) The number of items in the sample 
C) The number of items for which probability is desired 
D) Expected value 
A) Probability of success 
B) The number of items in the sample 
C) The number of items for which probability is desired 
D) Expected value

Question 7

_____ arise from external sources that are not inherent in the process.

Accepted Answer

A) External causes 
B) Special variations 
C) Special causes 
D) Common causes 
A) External causes 
B) Special variations 
C) Special causes 
D) Common causes

Question 8

Which of the following requires the opinion of an expert to determine the location and characteristics of a definable sample group?

Accepted Answer

A) Judgment sample 
B) Simple random sample 
C) Systematic sample 
D) Stratified sample 
A) Judgment sample 
B) Simple random sample 
C) Systematic sample 
D) Stratified sample

Question 9

A _____ is a subset of objects taken from the _____.

Accepted Answer

A) population; sample 
B) cluster; superset 
C) sample; population 
D) population; universal set 
A) population; sample 
B) cluster; superset 
C) sample; population 
D) population; universal set

Question 10

Exhibit 10-1
In an audit of the outstanding bills in a large multi-national firm, the auditor selected a random sample of 40 of these bills and recorded the dollar value of each outstanding bill.The data were analyzed using Excel (see below).
  
-Refer to Exhibit 10-1.Suppose the auditor wants to test,at a 1% significance level,the null hypothesis that the population mean dollar value of the outstanding bills is equal to 130.0 versus the alternative null hypothesis that the population mean dollar value of the outstanding bills is not equal to 130.0.The auditor:

Accepted Answer

A) should not reject the null hypothesis. 
B) should reject the null hypothesis. 
C) must collect more data before rejecting or not rejecting the null hypothesis. 
D) cannot reject the null hypothesis with less than a 5% significance level. 
A) should not reject the null hypothesis. 
B) should reject the null hypothesis. 
C) must collect more data before rejecting or not rejecting the null hypothesis. 
D) cannot reject the null hypothesis with less than a 5% significance level.

Question 11

As the risks associated with making an incorrect conclusion cannot be quantified in the case of a non-random sample,_____ sampling is not a preferred method of sampling.

Accepted Answer

A) stratified random 
B) cluster 
C) systematic 
D) judgment 
A) stratified random 
B) cluster 
C) systematic 
D) judgment

Question 12

A quality engineer in a light bulb factory is planning a study to estimate the average life of a large shipment of light bulbs.The engineer wants to estimate the average life within plus or minus 15 hours with 95 percent confidence.Assuming a process standard deviation of 100 hours,determine the sample size for this study.

Accepted Answer

A) 7 
B) 43 
C) 58 
D) 171 
A) 7 
B) 43 
C) 58 
D) 171

Question 13

Explain the lessons learned from Deming's Red Bead Experiment.

Accepted Answer

As described in the text,the major lesso

Question 14

A manager was assigned the task of investigating the error in payments for routine purchases made by the purchasing department.The manager randomly selected 12 payments,investigated them thoroughly,and determined the payment error for each of these payments.The payment error was defined as the difference between the amount paid and what should have been paid.The payment errors determined for these selected payments were as follows:
 
a.What is the 95% confidence interval for the population mean payment error?
b.Suppose a recent company report inferred that the mean payment error may be running as high as $25.That led the manager to test the null hypothesis that the population mean payment error is equal to $25 versus the alternative that the population mean payment error is not equal to $25.Using a significance level equal to 0.01, perform this hypothesis test.
c.Suppose another manager used this same data to test the null hypothesis that the population mean payment error is less than or equal to $15 versus the alternative that the population mean payment error is greater than to $15.What is the test statistic for this hypothesis testing situation?

Accepted Answer

The answer of A manager was assigned the task of...

Question 15

A _____ represents a theoretical model of the relative frequency of a random variable.

Accepted Answer

A) probability distribution 
B) random distribution 
C) sample 
D) random variable 
A) probability distribution 
B) random distribution 
C) sample 
D) random variable

Question 16

A stable system contains only common cause variation.

Accepted Answer

A) True 
 B)False

Question 17

The Red Bead Experiment demonstrates that common-cause variation in processes cannot be predicted.

Accepted Answer

A) True 
 B)False

Question 18

Correlation is a measure of the linear or non-linear relationship between two variables.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is NOT an operational problem created by variation?

Accepted Answer

A) Variation increases unpredictability. 
B) Variation reduces capacity utilization. 
C) Variation contributes to a "bullwhip" effect. 
D) Variation makes it easy to find root causes. 
A) Variation increases unpredictability. 
B) Variation reduces capacity utilization. 
C) Variation contributes to a "bullwhip" effect. 
D) Variation makes it easy to find root causes.

Question 20

Exhibit 10-3
An engineer collected data from three different types of power drills.Specifically, the engineer collected data on how long (in minutes)each type of drill would run continuously after a full battery recharge.Each drill was charged and run continuously 15 times.The reported data are contained in the following table.The engineer analyzed the data using one-way ANOVA in Excel and the results from Excel are also given below.

-Refer to Exhibit 10-3.What is the 95% confidence interval for the population mean continuous run time for the Type 3 drill?

Accepted Answer

A)  (59.5, 72.1) 
B)  (54.1, 77.5) 
C)  (58.0, 73.6) 
D)  (59.9, 71.7) 
A)  (59.5, 72.1) 
B)  (54.1, 77.5) 
C)  (58.0, 73.6) 
D)  (59.9, 71.7)

A system governed only by common cause variation is a system that:

All else being equal,as the confidence interval increases,the confidence level increases.

Deming's Funnel Experiment illustrates that people can and do create unwanted process variation by indiscriminately trying to remove common-cause variation.

According to Deming,the analysis of a static population is called:

An experiment that evaluates the effect of two temperatures (200 and 400 degrees)and two reaction times (50 and 100 minutes)on process yield has ___ possible combinations to test.

In a binomial distribution, What does "x" stand for?

_____ arise from external sources that are not inherent in the process.

Which of the following requires the opinion of an expert to determine the location and characteristics of a definable sample group?

A _ is a subset of objects taken from the _.

As the risks associated with making an incorrect conclusion cannot be quantified in the case of a non-random sample,_____ sampling is not a preferred method of sampling.

Explain the lessons learned from Deming's Red Bead Experiment.

A _____ represents a theoretical model of the relative frequency of a random variable.

A stable system contains only common cause variation.

The Red Bead Experiment demonstrates that common-cause variation in processes cannot be predicted.

Correlation is a measure of the linear or non-linear relationship between two variables.

Which of the following is NOT an operational problem created by variation?

Introduction

Total Quality In Organizations

Philosophies And Frameworks

Strategic Focus For Performance Excellence

Focusing On Customers

High Performance Workforce Management

Process Management

Performance Measurement And Information Management

Leading, building, and Sustaining Performance Excellence

Six Sigma And Process Improvement

Design For Quality And Product Excellence

Statistical Process Control

Filters

Exam 10: Statistical Thinking And Applications

A system governed only by common cause variation is a system that:

All else being equal,as the confidence interval increases,the confidence level increases.

Deming's Funnel Experiment illustrates that people can and do create unwanted process variation by indiscriminately trying to remove common-cause variation.

According to Deming,the analysis of a static population is called:

An experiment that evaluates the effect of two temperatures (200 and 400 degrees)and two reaction times (50 and 100 minutes)on process yield has ___ possible combinations to test.

In a binomial distribution, What does "x" stand for?

_____ arise from external sources that are not inherent in the process.

Which of the following requires the opinion of an expert to determine the location and characteristics of a definable sample group?

A _____ is a subset of objects taken from the _____.

As the risks associated with making an incorrect conclusion cannot be quantified in the case of a non-random sample,_____ sampling is not a preferred method of sampling.

Explain the lessons learned from Deming's Red Bead Experiment.

A _____ represents a theoretical model of the relative frequency of a random variable.

A stable system contains only common cause variation.

The Red Bead Experiment demonstrates that common-cause variation in processes cannot be predicted.

Correlation is a measure of the linear or non-linear relationship between two variables.

Which of the following is NOT an operational problem created by variation?

Introduction

Total Quality In Organizations

Philosophies And Frameworks

Strategic Focus For Performance Excellence

Focusing On Customers

High Performance Workforce Management

Process Management

Performance Measurement And Information Management

Leading, building, and Sustaining Performance Excellence

Six Sigma And Process Improvement

Design For Quality And Product Excellence

Statistical Process Control

Filters

A _ is a subset of objects taken from the _.