Statistical Quality Control

10 Questions | Total Attempts: 316

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Statistical  Quality Control - Quiz

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Questions and Answers
  • 1. 
    In acceptance sampling, when there is a finite probability that the lot may be accepted even if the quality is not really good, is called as __________.
    • A. 

      Consumer’s risk

    • B. 

      Operator’s risk

    • C. 

      Owner’s risk

    • D. 

      Producer’s risk 

  • 2. 
    In acceptance sampling, when there is a finite probability that the lot may be rejected even if the quality is actually good, is called as __________.
    • A. 

      Consumer’s risk 

    • B. 

      Operator’s risk

    • C. 

      Producer’s risk

    • D. 

      Operator’s risk

  • 3. 
    In double sampling plan, if the numbers of defects is in between the two cut off numbers C1 and C2 then ______________.
    • A. 

      Accept the lot 

    • B. 

      Take another sample

    • C. 

       none of these

    • D. 

      Reject the lot d)

  • 4. 
    In double sampling plan ____________.
    • A. 

      Maximum one sample is taken 

    • B. 

      Maximum two sample is taken

    • C. 

      Maximum three sample is taken 

    • D. 

      None of these

  • 5. 
    Which of the following is not a sampling plan?
    • A. 

      Single sampling plan

    • B. 

      Triple sampling plan

    • C. 

      Double sampling plan 

    • D. 

      Sequential sampling plan

  • 6. 
    Which of the following statements are true regarding single sampling plans?
    • A. 

      The lot under test will be rejected if the total defective items in the sample exceed an acceptance number “C”

    • B. 

      All items of a random sample of size”n” must be defined and tested.

    • C. 

      A rejected sample results in 100% sampling or return of the lot to the producer

    • D. 

      All the above

  • 7. 
    The maximum value of the average outgoing quality over all possible values of the proportion defective is called _____________.
    • A. 

      Lot tolerance proportion defective (LTPD)

    • B. 

      Average outgoing quality limit (AOQL)

    • C. 

      Average outgoing quality (AOQ)

    • D. 

      Acceptable quality level (AQL)

  • 8. 
    The producer’s risk means the probability that the consumer will ______.
    • A. 

      Accept a good lot c) accept a bad lot

    • B. 

      Accept a bad lot

    • C. 

       reject a bad lot

    • D. 

      Reject a good lot

  • 9. 
    The consumer’s risk means the probability that the consumer will ______.  
    • A. 

      Accept a good lot

    • B. 

      Accept a bad lot

    • C. 

      Reject a bad lot

    • D. 

       Reject a good lot

  • 10. 
    A decision rule to accept or reject a lot based on the results of one random sample is called a __.
    • A. 

      Single sampling plan

    • B. 

      Sequential sampling plan

    • C. 

      Random sampling plan

    • D. 

      Double sampling plan d) 

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