The Psychology of Quality and More
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The Psychology of Quality and More |
Central limit theoremThe central limit theorem states that when you average sets of numbers, the distribution of the sets will tend towards a normal distribution. It is particularly useful in building control charts where averaging subgroups enables control limits to be better defined and improves the value of the chart.A simple example of how the central limit theorem works is in the distribution of scores from increasing numbers of dice throws, as below.
See also:Variation, SPC, Histogram, Control Chart |
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