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Lecture 14

Lecture 14. Chapter 7 Tolerance Intervals. Last topic: Tolerance Intervals. Gray Area = 0.99. . Area = 0.005. Area = 0.005. . LNTL 0.99. UNTL 0.99. Total area at two tails = 0.01 Total gray area = 0.99.

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Lecture 14

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  1. Lecture 14 Chapter 7 Tolerance Intervals

  2. Last topic: Tolerance Intervals Gray Area = 0.99  Area = 0.005 Area = 0.005  LNTL0.99 UNTL0.99 Total area at two tails = 0.01 Total gray area = 0.99

  3. When population  and  are known, the natural tolerance limits are calculated in a straight forward way.. • LNTL(1-) =   z/2·  • UNTL(1-) =  + z/2· 

  4. Natural Tolerance Limits when  and  are not known: We will denote the tolerance level with (, 1),  representing the level of confidence, which is less than 100% due to the uncertainty because of using sample average and variance.

  5. THE  END

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