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Line 79: === Heuristics === For the quantiles of the comparison distribution typically the formula {{math\|''k'' / (''n'' + 1)}} is used.{{Citation needed\|reason=Is there consensus that this is typical?\|date=December 2015}} Several different formulas have been used or proposed as [[affine transformation\|affine]] [[symmetrical]] '''plotting positions'''. Such formulas have the form {{math\|(''k'' − ''a'') / (''n'' + 1 − 2''a'')}} for some value of {{math\|''a''}} in the range from 0 to 1/2, which gives a range between {{math\|''k'' / (''n'' + 1)}} and {{math\|(''k'' − 1/2) / (''n'' - 1)}}. Other expressions include:

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