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Exam 21: Statistical Methods for Quality Control

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Question 21

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

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

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Question 22

Multiple Choice

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DFSS stands for​

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

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Question 23

Multiple Choice

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

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.

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

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.

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.

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

In quality control terminology, a group of items is a

The two general classifications of attributes in quality control are​

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

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

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

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

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

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.

Juran proposed a simple definition of quality:​

Producer's risk is

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

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.