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Q12-16

Q18-22

Q23-27

Question 1

Correct

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Flag question Question text

A sample statistic that falls outside the upper and lower control limits of a control limit is an

indication of what?

Select one:

a. assignable variation b. random variation

c. type I error

d. type II error

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Correct Marks for this submission: 1.00/1.00.

Question 2

Incorrect

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Flag question Question text

As the amount of quality inspection increases beyond the optimal level, what is not expected to

occur? Select one:

a. Cost of inspection increases

b. Cost of undetected defects decrease c. Total cost of inspection and undetected defects increases

d. Cost of undetected defects increases

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Incorrect Marks for this submission: 0.00/1.00.

Question 3

Correct

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Flag question Question text

One reason the amount of inspection required for a high-volume, low-cost item such as pencils is

relatively low is;

Select one:

a. The production processes are usually highly reliable b. Defects are hard to detect

c. Profit margins are too low

d. The level of automation makes inspection difficult

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Question 4

Correct

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Flag question Question text

Process capability calculations account for the actual level of variability in the process and:

Select one:

a. Upper and lower control limits.

b. The proportion defective in samples.

c. Average sample range. d. Design specifications.

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Question 5

Correct

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Flag question Question text The determination of whether the variability of a process output falls within the acceptable range

allowed by the design specifications is called what?

Select one:

a. statistical process control

b. capability analysis c. six sigma quality

d. p-charts

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Question 6

Correct

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Flag question Question text

What action might a manager take if it was discovered process variability exceeded design

specifications?

Select one:

a. Redesign the process to reduce variability

b. Use an alternative process capable of meeting design specifications

c. Examine design specifications to see if they could be altered

d. All are possible actions Check Feedback

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Question 7

Correct

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Flag question Question text

What statement summarizes the focus of the six sigma methodology for managing quality?

Select one:

a. Minimizing process variability b. Experimenting with factors that affect process variation

c. Developing products with narrow design specifications

d. Eliminating random variation from control charts

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Correct Marks for this submission: 1.00/1.00.

Question 8

Correct

Mark 1.00 out of 1.00 Flag question Question text

What type of control chart would be used to monitor the number of defects per unit of output for

a process that manufacturers fibreglass hulls for boats?

Select one:

a. x-bar chart.

b. p- chart.

c. c-chart. d. R chart.

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Correct Marks for this submission: 1.00/1.00.

Question 9

Correct

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Flag question Question text

Which of the following is not an accurate statement regarding different phases and approaches to

statistical quality control / improvement?

Select one:

a. Continuous improvement builds quality into the process b. Acceptance sampling is used for inputs and outputs of processes

c. Acceptance sampling is a more progressive than six sigma d. Process control is used to take corrective action during production

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Correct Marks for this submission: 1.00/1.00.

Question 10

Correct

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Flag question Question text

Which statement concerning setting up control charts is not true?

Select one:

a. Larger sample sizes n reduce the probability of Type II error

b. Sample statistics that fall inside control limits indicate random variation only

c. Sample statistics outside control limits indicate assignable causes of variation

d. Control limits are set based on design specifications Check Feedback

Correct Marks for this submission: 1.00/1.00.

Question 11 Correct

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Flag question Question text

A control chart used to monitor the process mean is the:

Select one:

a. p-chart

b. R-chart

c. Gantt chart

d. x-bar chart e. c-chart

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Correct Marks for this submission: 1.00/1.00.

Question 12

Correct

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Flag question Question text

A design engineer wants to construct a sample mean chart for controlling the service life of one

of the types of light bulbs his company produces. He knows from numerous previous samples

that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four

bulbs, with these results: What is the sample mean service life for sample 2?

Select one:

a. 525 hours

b. 495 hours

c. 515 hours d. 460 hours

e. 500 hours

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Correct Marks for this submission: 1.00/1.00.

Question 13

Correct

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Flag question Question text

A design engineer wants to construct a sample mean chart for controlling the service life of one

of the types of light bulbs his company produces. He knows from numerous previous samples

that this service life is normally distributed with a mean of 500 hours and a standard deviation of

20 hours. On three recent production batches, he tested service life on random samples of four

bulbs, with these results: What is the mean of the sampling distribution of sample means for whenever service life is in

control?

Select one:

a. 250 hours

b. 515 hours

c. 470 hours

d. 495 hours

e. 500 hours Check Feedback

Correct Marks for this submission: 1.00/1.00.

Question 14

Correct

Mark 1.00 out of 1.00

Flag question Question text

A design engineer wants to construct a sample mean chart for controlling the service life of one

of the types of light bulbs his company produces. He knows from numerous previous samples

that this service life is normally distributed with a mean of 500 hours and a standard deviation of

20 hours. On three recent production batches, he tested service life on random samples of four

bulbs, with these results: What is the standard deviation of the sampling distribution of sample means for whenever

service life is in control?

Select one:

a. 11.55 hours

b. 6.67 hours

c. 10 hours d. 20 hours

e. 5 hours

Check Feedback

Correct Marks for this submission: 1.00/1.00.

Question 15

Correct

Mark 1.00 out of 1.00

Flag question Question text

A design engineer wants to construct a sample mean chart for controlling the service life of one

of the types of light bulbs his company produces. He knows from numerous previous samples

that this service life is normally distributed with a mean of 500 hours and a standard deviation of

20 hours. On three recent production batches, he tested service life on random samples of four

bulbs, with these results: If he uses upper and lower control limits of 520 and 480 hours, what is his risk (alpha) of

concluding service life is out of control when it is actually under control (Type I error)?

Select one:

a. 0.9544

b. 0.3174

c. 0.0456 d. 0.0026

e. 0.6826

Check Feedback

Correct Marks for this submission: 1.00/1.00.

Question 16

Correct

Mark 1.00 out of 1.00

Flag question Question text

A design engineer wants to construct a sample mean chart for controlling the service life of one

of the types of light bulbs his company produces. He knows from numerous previous samples

that this service life is normally distributed with a mean of 500 hours and a standard deviation of

20 hours. On three recent production batches, he tested service life on random samples of four

bulbs, with these results: If he uses upper and lower control limits of 520 and 480 hours, on what sample(s) (if any) does

service life appear to be out of control?

Select one:

a. both samples 2 and 3

b. sample 2

c. none

d. sample 3 e. sample 1

Check Feedback

Correct Marks for this submission: 1.00/1.00.

Question 17

Correct

Mark 1.00 out of 1.00

Flag question Question text

For which of the following would a p-chart be used?

Select one:

a. monitor the number of defects per unit

b. monitor average shrinkage c. monitor the fraction defectives in a sample d. monitor the range of values

e. monitor dispersion in sample data

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Correct Marks for this submission: 1.00/1.00.

Question 18

Correct

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Flag question Question text

A Quality Analyst wants to construct a control chart for determining whether four machines, all

producing the same product, are under control with regard to a particular quality attribute.

Accordingly, she inspected 1,000 units of output from each machine in random samples, with the

following results: What is the sample proportion of defectives for machine #1?

Select one:

a. .005

b. .023 c. .0115 d. .02

e. .0058

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Correct Marks for this submission: 1.00/1.00.

Question 19

Correct

Mark 1.00 out of 1.00

Flag question Question text

A Quality Analyst wants to construct a control chart for determining whether four machines, all

producing the same product, are under control with regard to a particular quality attribute.

Accordingly, she inspected 1,000 units of output from each machine in random samples, with the

following results: What is the estimate of the process proportion of defectives for whenever it is under control?

Select one:

a. .06

b. .08

c. .02 d. .04

e. .01 Check Feedback

Correct Marks for this submission: 1.00/1.00.

Question 20

Correct

Mark 1.00 out of 1.00

Flag question Question text

A Quality Analyst wants to construct a control chart for determining whether four machines, all

producing the same product, are under control with regard to a particular quality attribute.

Accordingly, she inspected 1,000 units of output from each machine in random samples, with the

following results: What is the estimate of the standard deviation of the sampling distribution of sample proportion

for whenever this process is under control?

Select one:

a. .00016

b. .04

c. .00002

d. .016

e. .0044 Check Feedback

Correct Marks for this submission: 1.00/1.00.

Question 21

Correct

Mark 1.00 out of 1.00

Flag question Question text

A Quality Analyst wants to construct a control chart for determining whether four machines, all

producing the same product, are under control with regard to a particular quality attribute.

Accordingly, she inspected 1,000 units of output from each machine in random samples, with the

following results: What are the control chart upper and lower control limits for an alpha risk of .05?

Select one:

a. .0272 and .0128

b. .0287 and .0113 c. .0332 and .0068

d. .029 and .013

e. .0303 and .0097

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Correct Marks for this submission: 1.00/1.00. Question 22

Correct

Mark 1.00 out of 1.00

Flag question Question text

A Quality Analyst wants to construct a control chart for determining whether four machines, all

producing the same product, are under control with regard to a particular quality attribute.

Accordingly, she inspected 1,000 units of output from each machine in random samples, with the

following results: For upper and lower control limits of .026 and .014, which machine(s), if any, appear(s) to be

out-of-control for process proportion of defectives?

Select one:

a. machines #3 and #4 b. machine #3 only

c. machine #4 only

d. none of the machines

e. machines #2 and #3

Check Feedback

Correct Marks for this submission: 1.00/1.00.

Question 23

Correct

Mark 1.00 out of 1.00 Flag question Question text

A Quality Analyst wants to construct a sample mean chart for controlling a packaging process.

He knows from past experience that whenever this process is under control, package weight is

normally distributed with a mean of twenty ounces and a standard deviation of two ounces. Each

day last week, he randomly selected four packages and weighed each with the following results: What is the sample mean package weight for Thursday?

Select one:

a. 20.6 ounces

b. 20 ounces

c. 19 ounces d. 21 ounces

e. 23 ounces

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Correct Marks for this submission: 1.00/1.00.

Question 24

Correct

Mark 1.00 out of 1.00 Flag question Question text

A Quality Analyst wants to construct a sample mean chart for controlling a packaging process.

He knows from past experience that whenever this process is under control, package weight is

normally distributed with a mean of twenty ounces and a standard deviation of two ounces. Each

day last week, he randomly selected four packages and weighed each with the following results: What is the mean of the sampling distribution of sample means for whenever this process is

under control?

Select one:

a. 18 ounces

b. 21 ounces

c. 22 ounces

d. 19 ounces

e. 20 ounces Check Feedback

Correct Marks for this submission: 1.00/1.00.

Question 25

Correct

Mark 1.00 out of 1.00 Flag question Question text

A Quality Analyst wants to construct a sample mean chart for controlling a packaging process.

He knows from past experience that whenever this process is under control, package weight is

normally distributed with a mean of twenty ounces and a standard deviation of two ounces. Each

day last week, he randomly selected four packages and weighed each with the following results: What is the standard deviation of the sampling distribution of sample means for whenever this

process is under control?

Select one:

a. 0.4 ounces

b. 0.1 ounces

c. 1 ounce d. 2 ounces

e. 0.5 ounces

Check Feedback

Correct Marks for this submission: 1.00/1.00.

Question 26

Correct

Mark 1.00 out of 1.00 Flag question Question text

A Quality Analyst wants to construct a sample mean chart for controlling a packaging process.

He knows from past experience that whenever this process is under control, package weight is

normally distributed with a mean of twenty ounces and a standard deviation of two ounces. Each

day last week, he randomly selected four packages and weighed each with the following results: If he uses upper and lower control limits of 22 and 18 ounces, what is his risk (alpha) of

concluding this process is out of control when it is actually in control (Type I error)?

Select one:

a. 0.0026

b. 0.3174

c. 0.0456 d. 0.6826

e. 0.9544

Check Feedback

Correct Marks for this submission: 1.00/1.00.

Question 27

Correct

Mark 1.00 out of 1.00 Flag question Question text

A Quality Analyst wants to construct a sample mean chart for controlling a packaging process.

He knows from past experience that whenever this process is under control, package weight is

normally distributed with a mean of twenty ounces and a standard deviation of two ounces. Each

day last week, he randomly selected four packages and weighed each with the following results: If he uses upper and lower control limits of 22 and 18 ounces, on what day(s), if any, does this

process appear to be out of control?

Select one:

a. Monday, Tuesday, and Thursday

b. Monday c. Tuesday

d. none

e. Monday and Tuesday

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Correct Marks for this submission: 1.00/1.00.

Question 28

Correct

Mark 1.00 out of 1.00 Flag question Question text

The specifications for a product are 6 mm 0.1 mm. The process is known to operate at a mean of 6.05 mm with a standard deviation of 0.01 mm. What is the Cpkfor this process?

Select one:

a. none of the choices

b. 3.33

c. 1.67 d. 5.00

e. 2.50

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Correct Marks for this submission: 1.00/1.00.

Question 29

Correct

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Flag question Question text

The term "2 sigma limits" in the context of a control chart refers to the variability of the: Select one:

a. sampling distribution b. sample

c. process

d. none of the choices

e. population

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Question 30

Correct

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Flag question Question text

Which of the following is not a step in the quality control planning process?

Select one:

a. eliminate all defects found b. define the quality characteristic to be controlled

c. plan how inspection is to be done

d. all of the choices are steps.

e. determine a quality control point in the process Check Feedback

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Question 31

Correct

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Flag question Question text

A c-chart is used to monitor the number of defectives in the output of a process.

Select one:

True

False Check Feedback

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Question 32

Correct

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Flag question Question text

A c-chart is used to monitor the number of defects per unit of process output. Select one:

True False

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Question 33

Correct

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Flag question Question text

Approximately 99.7% of sample means will fall within Â± two standard deviations of the process

mean.

Select one:

True

False Check Feedback

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Question 34

Correct

Mark 1.00 out of 1.00 Flag question Question text

A process capability index (C ) of 0.70 indicates that a process is capable of producing to design

specifications.

p Select one:

True

False Check Feedback

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Question 35

Correct

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Flag question Question text

A sample statistic that falls inside the control limits suggests assignable variation in the process.

Select one:

True

False Check Feedback

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Question 36

Correct

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Flag question Question text

A sample statistic that falls outside the control limits suggests that the process mean has changed.

Select one:

True False

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Question 37

Correct

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Flag question Question text Design specifications are equivalent to control limits.

Select one:

True

False Check Feedback

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Question 38

Correct

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Flag question Question text

If a point on a control chart falls outside one of the control limits, this suggests that the process

output is non-random.

Select one:

True False

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Question 39

Correct

Mark 1.00 out of 1.00 Flag question Question text

Statistical process control is based on comparing periodic samples from a process to

predetermined limits.

Select one:

True False

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Question 40

Correct

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Flag question Question text

The amount of inspection needed is governed by the costs of inspection and the expected costs of

passing defective items.

Select one:

True False Check Feedback

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Question 41

Correct

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Flag question Question text

The output of a process may not conform to design specifications even though the process may

be statistically "in control".

Select one:

True False

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Question 42

Correct

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Flag question Question text The probability of a Type I error is the probability of concluding that only randomness is present

when assignable variation exists.

Select one:

True

False Check Feedback

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Question 43

Correct

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Flag question Question text

The process capability index, indicated by Cpis calculated as the ratio of the design specification

width to the process width.

Select one:

True False

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Question

Correct 44 Mark 1.00 out of 1.00

Flag question Question text

There is no direct link between design specifications and statistical process control limits.

Select one:

True False

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Question 45

Correct

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Flag question Question text

The sampling distribution can be assumed to be approximately normal even when the underlying

process distribution is not normally distributed, provided the sample size is sufficiently large.

Select one:

True False Check Feedback

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Question 46

Correct

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Flag question Question text

Typically the production of high-cost, low-volume items require little quality control inspection.

Select one:

True

False Check Feedback

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Question 47

Correct

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Flag question Question text Variation in a sample statistic collected from a process may be either random variation or

assignable variation.

Select one:

True False

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Question 48

Correct

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Flag question Question text

When a process is not centred, its capability should be based on considering the upper and lower

design specifications separately and not just the overall design specification width. The symbol

for this case is Cpk.

Select one:

True False

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Correct Marks for this submission: 1.00/1.00.

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DATE ANSWEREDSep 05, 2019

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