A process is in control with a defect rate of 0.2%. A sampling plans calls for 30 items to be selected at random, and for the process to be shut down and corrected if any defects are found. How often will the process be shut down without a change in the defect rate?

• A.3.91% of the time
• B.5.83% of the time
• C.None of the above
• D.1.22% of the time

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What distribution is used to determine the OC curve for an attributes sampling plan?

• A.The binomial or the hypergeometric distribution.
• B.Binomial.
• C.Normal.
• D.Exponential.

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You have been asked to sample a lot of 500 units from vendor whose past quality has been about 2% defective. A sample of 40 pieces is drawn from the lot and you have been told to reject the lot if you find two or more parts defective. What is the probability of finding two or more parts defective?

• A.0.953
• B.0.809
• C.0.191
• D.0.047

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A "p" chart

• A.Plots either the fraction or percent defective in order of time.
• B.Can be used for only one type of defect per chart.
• C.Plots variations in dimensions.
• D.Plots the number of defects in a sample.

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The descriptive name for a fishbone or Ishikawa diagram is which of the following?

• A.Pareto diagram.
• B.Cause and effect diagrams.
• C.Scatter diagram.
• D.Flow charts.

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