Question 1

An   chart is used if the quality of the output of the process is measured in terms of which level of measurement?

Accepted Answer

A)  Nominal 
B)  Ordinal 
C)  Interval or ratio 
D)  Large sample 
A)  Nominal 
B)  Ordinal 
C)  Interval or ratio 
D)  Large sample

Question 2

In quality control acceptance sampling procedure, if the quality is not satisfactory, we would

Accepted Answer

A)  reject the lot. 
B)  accept the lot. 
C)  try a different test. 
D)  send to customer. 
A)  reject the lot. 
B)  accept the lot. 
C)  try a different test. 
D)  send to customer.

Question 3

A production process that is in control has a mean of 83 and a standard deviation of 17.
a.
Determine the upper and the lower control limits for a sample size of 30.
b.
Five samples had means of 80, 83, 74, 83, and 90. Indicate whether or not the process is in control.

Accepted Answer

The answer of A production process that is in control...

Question 4

The upper and lower control limits of the mean of a process are 700 and 650. Samples of size 169 are used for the inspection process. Determine the mean and the standard deviation for this process.

Accepted Answer

Mean = 675

Question 5

Six Sigma represents a quality level of at most ____ defects per million opportunities.​

Accepted Answer

A)  ​3.4 
B)  ​6.0 
C)  ​19.7 
D)  ​99.5 
A)  ​3.4 
B)  ​6.0 
C)  ​19.7 
D)  ​99.5

Question 6

Setting the upper and lower control limits in a control chart closer to the center line results in a​

Accepted Answer

A)  ​lower probability of a Type I error. 
B)  ​lower probability of a Type II error. 
C)  ​lower probability of both a Type I and Type II error. 
D)  ​higher probability of both a Type I and Type II error. 
A)  ​lower probability of a Type I error. 
B)  ​lower probability of a Type II error. 
C)  ​lower probability of both a Type I and Type II error. 
D)  ​higher probability of both a Type I and Type II error.

Question 7

One purpose of control charts is to bring attention to the possible existence of _____ cause variation.

Accepted Answer

A)  common 
B)  assignable . 
C)  both common and assignable 
D)  neither common or assignable 
A)  common 
B)  assignable . 
C)  both common and assignable 
D)  neither common or assignable

Question 8

Juran proposed a simple definition of quality:​

Accepted Answer

A)  ​customer satisfaction. 
B)  ​conformance to specifications. 
C)  ​fitness for use. 
D)  ​commitment to excellence. 
A)  ​customer satisfaction. 
B)  ​conformance to specifications. 
C)  ​fitness for use. 
D)  ​commitment to excellence.

Question 9

Setting the upper and lower control limits in a control chart farther from the center line results in a​

Accepted Answer

A)  ​lower probability of a Type I error. 
B)  ​lower probability of a Type II error. 
C)  ​lower probability of both a Type I and Type II error. 
D)  ​higher probability of both a Type I and Type II error. 
A)  ​lower probability of a Type I error. 
B)  ​lower probability of a Type II error. 
C)  ​lower probability of both a Type I and Type II error. 
D)  ​higher probability of both a Type I and Type II error.

Question 10

An acceptance sampling plan uses a sample of 20 with an acceptance criterion of zero. Determine the probability of accepting shipments that contain 5, 10, 15, 20, 25, 30, 35, and 40% defective units.

Accepted Answer

The answer of An acceptance sampling plan uses a sample...

Question 11

A production process that is in control has a mean (µ) of 189 and a standard deviation (σ) of 21.
Determine the lower and the upper control limits for sample sizes of 64.

Accepted Answer

LCL = 181.

Question 12

DFSS stands for​

Accepted Answer

A)  ​Defects Found Sifting and Sorting 
B)  ​Design For Six Sigma 
C)  ​Deviation From Specifications and Standards 
D)  ​Defer For Statistical Study 
A)  ​Defects Found Sifting and Sorting 
B)  ​Design For Six Sigma 
C)  ​Deviation From Specifications and Standards 
D)  ​Defer For Statistical Study

Question 13

In quality control terminology, the statistical procedure of acceptance sampling's null hypothesis is that

Accepted Answer

A)  the lots are not equal. 
B)  lot 1 is greater than lot 2. 
C)  it is a good-quality lot. 
D)  it is a poor-quality lot. 
A)  the lots are not equal. 
B)  lot 1 is greater than lot 2. 
C)  it is a good-quality lot. 
D)  it is a poor-quality lot.

Question 14

The upper and lower control limits of the mean of a process are 672 and 654. Samples of size 256 are used for the inspection process. Determine the mean and the standard deviation for this process.

Accepted Answer

Mean = 663

Question 15

Whenever assignable causes are detected, we conclude that the process is

Accepted Answer

A)  out of control. 
B)  in statistical control. 
C)  controllable. 
D)  random. 
A)  out of control. 
B)  in statistical control. 
C)  controllable. 
D)  random.

Question 16

The two general classifications of attributes in quality control are​

Accepted Answer

A)  ​random and predictable. 
B)  ​controllable and uncontrollable. 
C)  ​variable and constant. 
D)  ​defective and nondefective. 
A)  ​random and predictable. 
B)  ​controllable and uncontrollable. 
C)  ​variable and constant. 
D)  ​defective and nondefective.

Question 17

A control chart that is used to monitor the variation of the measurements in a sample is a(n) _____ chart.

Accepted Answer

A)  p 
B)  X 
C)  R 
D)  np 
A)  p 
B)  X 
C)  R 
D)  np

Question 18

In practice, it is common to use the sample ________ to estimate the process _________. ​

Accepted Answer

A)  ​variances, range 
B)  ​means, variance 
C)  ​standard deviations, mean 
D)  ​ranges, standard deviation 
A)  ​variances, range 
B)  ​means, variance 
C)  ​standard deviations, mean 
D)  ​ranges, standard deviation

Question 19

Producer's risk is

Accepted Answer

A)  the same as the Consumer's risk. 
B)  the probability of Type II error. 
C)  the probability of Type I error. 
D)  the probability of accepting a poor-quality lot. 
A)  the same as the Consumer's risk. 
B)  the probability of Type II error. 
C)  the probability of Type I error. 
D)  the probability of accepting a poor-quality lot.

Question 20

In quality control terminology, a group of items is a

Accepted Answer

A)  sample. 
B)  bundle. 
C)  lot 
D)  stock. 
A)  sample. 
B)  bundle. 
C)  lot 
D)  stock.

Exam 21: Statistical Methods for Quality Control

An chart is used if the quality of the output of the process is measured in terms of which level of measurement?

In quality control acceptance sampling procedure, if the quality is not satisfactory, we would

A production process that is in control has a mean of 83 and a standard deviation of 17. a. Determine the upper and the lower control limits for a sample size of 30. b. Five samples had means of 80, 83, 74, 83, and 90. Indicate whether or not the process is in control.

The upper and lower control limits of the mean of a process are 700 and 650. Samples of size 169 are used for the inspection process. Determine the mean and the standard deviation for this process.

Six Sigma represents a quality level of at most ____ defects per million opportunities.​

Setting the upper and lower control limits in a control chart closer to the center line results in a​

One purpose of control charts is to bring attention to the possible existence of _____ cause variation.

Juran proposed a simple definition of quality:​

Setting the upper and lower control limits in a control chart farther from the center line results in a​

An acceptance sampling plan uses a sample of 20 with an acceptance criterion of zero. Determine the probability of accepting shipments that contain 5, 10, 15, 20, 25, 30, 35, and 40% defective units.

A production process that is in control has a mean (µ) of 189 and a standard deviation (σ) of 21. Determine the lower and the upper control limits for sample sizes of 64.

DFSS stands for​

In quality control terminology, the statistical procedure of acceptance sampling's null hypothesis is that

The upper and lower control limits of the mean of a process are 672 and 654. Samples of size 256 are used for the inspection process. Determine the mean and the standard deviation for this process.

Whenever assignable causes are detected, we conclude that the process is

The two general classifications of attributes in quality control are​

A control chart that is used to monitor the variation of the measurements in a sample is a(n) _____ chart.

In practice, it is common to use the sample ________ to estimate the process _________. ​

Producer's risk is

In quality control terminology, a group of items is a

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Decision Analysis

Index Numbers

Sample Survey

Filters

Six Sigma represents a quality level of at most ____ defects per million opportunities.

Setting the upper and lower control limits in a control chart closer to the center line results in a

Juran proposed a simple definition of quality:

Setting the upper and lower control limits in a control chart farther from the center line results in a

DFSS stands for

The two general classifications of attributes in quality control are

In practice, it is common to use the sample to estimate the process _.