Question 1

Which of the following statements are not correct?

Accepted Answer

A) For a 3-sigma $\bar { X }$ Chart, where the process mean $\mu$ And standard deviation $\sigma$ Are known, the probability that a point on the chart falls above the UCL is .013, as is the probability that the point falls below the LCL. B) For a 3-sigma S chart, $P \left( S _ { i } > U C L \right) = P \left( S _ { i } U C L ) = P ( R _{i} < L C L ) = .0013$ D) Only B and C are not correct. E) Only A and C are not correct. A) For a 3-sigma $\bar { X }$ Chart, where the process mean $\mu$ And standard deviation $\sigma$ Are known, the probability that a point on the chart falls above the UCL is .013, as is the probability that the point falls below the LCL. B) For a 3-sigma S chart, $P \left( S _ { i } > U C L \right) = P \left( S _ { i } U C L ) = P ( R _{i} < L C L ) = .0013$ D) Only B and C are not correct. E) Only A and C are not correct.

Question 2

The inability of $\bar { X }$ charts with 3-sigma limits to quickly detect small shifts in the process mean has prompted investigators to develop procedures that provide improved behavior in this respect. Which of the following conditions need to be satisfied for an appropriated intervention to take corrective action?

Accepted Answer

A)  Two out of three successive points fall outside 2-sigma limits on the same side of the center line. 
B)  Four out of five successive points fall outside 1-sigma limits on the same side of the center line. 
C)  Eight successive points fall on the same side of the center line. 
D)  All of the above. 
E)  None of the above. 
A)  Two out of three successive points fall outside 2-sigma limits on the same side of the center line. 
B)  Four out of five successive points fall outside 1-sigma limits on the same side of the center line. 
C)  Eight successive points fall on the same side of the center line. 
D)  All of the above. 
E)  None of the above.

Question 3

Which of the following statements are not true?

Accepted Answer

A)  A particular V-mask is determined by specifying the "lead distance" d and "half angle" $\theta$
, or equivalently, by specifying d and the length h of the vertical line segment from 0 to the lower (or to the upper) arm of the mask. 
B)  One method for deciding which V-mask to use involves specifying the size of a shift in the process mean that is of particular concern to an investigator, then the parameters of the mask are chosen to give desired values of $\alpha \text { and } \beta$
The false-alarm probability and the probability of not detecting the specified shift, respectively. 
C)  One method for deciding which V-mask to use involves selecting the mask that yields specified values of the ARL (average run length) both for an in-control process and for a process in which the mean has shifted by a designated amount. 
D)  All of the above statements are true. 
E)  None of the above statements are true. 
A)  A particular V-mask is determined by specifying the "lead distance" d and "half angle" $\theta$
, or equivalently, by specifying d and the length h of the vertical line segment from 0 to the lower (or to the upper) arm of the mask. 
B)  One method for deciding which V-mask to use involves specifying the size of a shift in the process mean that is of particular concern to an investigator, then the parameters of the mask are chosen to give desired values of $\alpha \text { and } \beta$
The false-alarm probability and the probability of not detecting the specified shift, respectively. 
C)  One method for deciding which V-mask to use involves selecting the mask that yields specified values of the ARL (average run length) both for an in-control process and for a process in which the mean has shifted by a designated amount. 
D)  All of the above statements are true. 
E)  None of the above statements are true.

Question 4

Assume that the total number of defects in 50 samples are 450. Which of the following statements are not true regarding the c chart for the number of defectives?

Accepted Answer

A)  The center line of the chart is at height 9 
B)  The lower control limit (LCL) is 0 
C)  The upper control limit (UCL) is 18 
D)  All of the above statements are true 
E)  None of the above statements are true 
A)  The center line of the chart is at height 9 
B)  The lower control limit (LCL) is 0 
C)  The upper control limit (UCL) is 18 
D)  All of the above statements are true 
E)  None of the above statements are true

Question 5

The term __________ data is used in quality control to describe situations such as each item produced conforms to specifications or does not, or a single item (e.g., one automobile) may have one or more defects, and the number of defects is determined.

Accepted Answer

The answer of The term __________ data is used in...

Question 6

Assume that for an in-control process, the random variable of interest X has a normal distribution with mean value $\mu$ and standard deviation $\sigma$ . If $\bar { X }$ denotes the sample mean for a random sample of size n selected at a particular time, then

Accepted Answer

A)  $E ( \bar { X } ) = \mu$ 
B)  $\sigma _ { \bar { x } } = \sigma / \sqrt { n }$ 
C)  $\bar { X }$
Has a normal distribution. 
D)  All of the above are true. 
E)  None of the above are true. 
A)  $E ( \bar { X } ) = \mu$ 
B)  $\sigma _ { \bar { x } } = \sigma / \sqrt { n }$ 
C)  $\bar { X }$
Has a normal distribution. 
D)  All of the above are true. 
E)  None of the above are true.

Which of the following statements are not correct?

Which of the following statements are not true?

Assume that the total number of defects in 50 samples are 450. Which of the following statements are not true regarding the c chart for the number of defectives?

The term __________ data is used in quality control to describe situations such as each item produced conforms to specifications or does not, or a single item (e.g., one automobile) may have one or more defects, and the number of defects is determined.

Assume that for an in-control process, the random variable of interest X has a normal distribution with mean value $\mu$ and standard deviation $\sigma$ . If $\bar { X }$ denotes the sample mean for a random sample of size n selected at a particular time, then

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Tests of Hypotheses Based on a Single Sample

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The Analysis of Variance

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Nonlinear and Multiple Regression

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Exam 16: Quality Control Methods

Which of the following statements are not correct?

Which of the following statements are not true?

Assume that the total number of defects in 50 samples are 450. Which of the following statements are not true regarding the c chart for the number of defectives?

The term __________ data is used in quality control to describe situations such as each item produced conforms to specifications or does not, or a single item (e.g., one automobile) may have one or more defects, and the number of defects is determined.

Assume that for an in-control process, the random variable of interest X has a normal distribution with mean value μ\muμ and standard deviation σ\sigmaσ . If Xˉ\bar { X }Xˉ denotes the sample mean for a random sample of size n selected at a particular time, then

Overview and Descriptive Statistics

Probability

Discrete Random Variables and Probability Distributions

Continuous Random Variables and Probability Distributions

Joint Probability Distributions and Random Samples

Point Estimation

Statistical Intervals Based on a Single Sample

Tests of Hypotheses Based on a Single Sample

Inferences Based on Two Samples

The Analysis of Variance

Multifactor Analysis of Variance

Simple Linear Regression and Correlation

Nonlinear and Multiple Regression

Goodness-Of-Fit Tests and Categorical Data Analysis

Distribution-Free Procedures

Filters

Assume that for an in-control process, the random variable of interest X has a normal distribution with mean value $\mu$ and standard deviation $\sigma$ . If $\bar { X }$ denotes the sample mean for a random sample of size n selected at a particular time, then