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William A. Levinson
Anthony Chirico1 describes how narrow-limit gauging (NLG, aka compressed limit plans) can reduce enormously the required sample size, and therefore the inspection cost, of a traditional attribute...
    Now, if you’re familiar with either statistics or J.R.R. Tolkien, I know the title grabbed your attention. And if not, don’t worry; all will become clear in time, but I’ve always wanted to reference The Lord of the Rings in a title (and scientific papers provide little opportunity for that)....
    Last month we provided an operational definition of when measurement systems are equivalent in terms of bias. Here we will look at comparing the within-instrument measurement error between two or more systems. Once again we must emphasize that it makes no sense to seek to compare measurement...
    Ever since sportswriter Henry Chadwick popularized the box score in the 19th century, baseball fans have had a love affair with statistics. Many can recite records like Joe DiMaggio’s 56-game hitting streak, Rickey Henderson’s 130 stolen bases, or Barry Bonds’ 73 home runs in one season. But have...
    As soon as we have two or more instruments for measuring the same property the question of equivalence raises its head. This paper provides an operational definition of when two or more instruments are equivalent in practice.  Churchill Eisenhart, Ph.D., while working at the U.S. Bureau...

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