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control chart |
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control chart n (Mathematics & Measurements / Statistics) Statistics a chart on which observed values of a variable are plotted, usually against the expected value of the variable and its allowable deviation, so that excessive variations in the quality, quantity, etc., of the variable can be detected How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| It should be noted, however, that a control chart indicating a process is in control does not necessarily assure the process will produce quality output. New pick lists and pop-up windows take users to a specific control chart faster than the previous series of menus. The configuration of a control chart involves a centerline that represents the mean of the data set, and "control limits" that are calculated to represent [+ or -]3 standard deviations (or standard errors of the mean). |
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