Exam 11: Statistically Based Quality Improvement for Variables

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The ________ uses past information to predict what the next process outcome will be.

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A 50-volt battery must be between 55 and 45 volts when it leaves the factory. Two hundred samples of batteries have yielded the following data: average charge of 49 volts with a standard deviation of 2.5 volts. What is the probability of producing an out-of-spec battery?

(Multiple Choice)
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The ________ is the difference between the largest measurement and the smallest measurement in a particular sample.

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Proportion defective, number defective, number nonconforming in a consistent sample space, and number defects per unit are examples of ________.

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A g chart is useful when data are hypergeometrically distributed.

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________ is useful because it ensures independence among observations.

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A 50-volt battery must be between 55 and 45 volts when it leaves the factory. Two hundred samples of batteries have yielded the following data: average charge of 49 volts with a standard deviation of 2.5 volts. What is the process capability?

(Multiple Choice)
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Which of the following is true of random variation?

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In a variables control chart, which of the following is likely to occur if large jumps of more than three or four standard deviations take place?

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To ________ means to sample in such a way that every piece of product has an equal chance of being selected for inspection.

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Process stability means that the variation we observe in the process is ________ variation.

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Processes that achieve capability indexes of 1.25 are world-class capable.

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One hundred percent samples are also known as screening samples.

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The ________ is used for monitoring variables and measurement on a continuous scale.

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In a variables control chart, which of the following has likely occurred if two points in succession are farther than two standard deviations from the mean?

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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?

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What is the difference between random and nonrandom variation?

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

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

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Consumer's risk is also called a ________ error.

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