Exam 11: Statistically Based Quality Improvement for Variables

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A(n) ________ is an either-or-situation resulting from a binomial process.

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________ variation is centered on a mean and occurs with a somewhat consistent amount of dispersion.

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Process charts are graphs designed to signal process workers when nonrandom variation is occurring in a process.

(True/False)
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Process population average, mean, range, moving range, and standard deviation are examples of ________.

(Multiple Choice)
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Describe x charts and R charts. List and describe the basic components of each.

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The first step in developing process control charts is to identify critical product characteristics.

(True/False)
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Quality practitioners should not compare process chart limits with product specifications.

(True/False)
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The upper and lower specifications for metal head plates are 5 ±0.1 cm. A sample of the metal head plates in 25 undergraduates yields a mean of 5.05. We know that the population standard deviation is 0.04. What is the population capability index?

(Multiple Choice)
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The R chart is a process chart used to monitor the average of the characteristic being measured.

(True/False)
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________ variation results from some event, such as shift in a process mean or some unexpected occurrence.

(Multiple Choice)
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World-class levels of process capability are measured by ________ defect levels.

(Multiple Choice)
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The ________ chart is used in monitoring process dispersion.

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The central limit theorem states that when we plot the sample means, the sampling distribution approximates a normal distribution.

(True/False)
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Variation within the data in a ________ subgroup can provide a yardstick for computing limits on the standard variation between subgroups.

(Multiple Choice)
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________ is a decision-making skill demonstrated by the ability to draw conclusions based on data.

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One of the reasons that statistical tools are deemed to fail is because people have a poor understanding of the scientific method.

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Statistical thinking is a decision-making skill demonstrated by the ability to draw conclusions based on data.

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The s chart is often used where variation in a process is large.

(True/False)
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Producer's risk is the probability that a nonconforming product will be available for sale.

(True/False)
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What is the lower limit of R for sample sizes less than or equal to six?

(Multiple Choice)
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