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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 Chapter 7 Tolerance Intervals
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
When population and are known, the natural tolerance limits are calculated in a straight forward way.. • LNTL(1-) = z/2· • UNTL(1-) = + z/2·
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.