Function description and function math calculation for this function are incoherent. Equation describes number of combinations of N over K, and function description is about average deviation of a set of values.
To correct this error.
Avedev() function Part 4, section 3.17.7.17
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Proposed Disposition of DIS 29500 Comment CL-0024 (Modified: 2008-01-13) Yes, the formula for this SpreadsheetML function is incorrect. In Part 4, §3.17.7.17, page 2,545, line numbers 2627, it will be changed from The number of combinations is as follows, where number = n and number-chosen = k: to The average of the absolute deviations of a set of data points from their mean is as follows, where n is the number of arguments in argument-list, x is an argument in argument-list, and x-bar is the x mean value: 1 - Similar Comments: AU-0026 , CA-0070 , CO-0165 , DK-0162 , ECMA-0025 , FR-0466 , GB-0378 , MT-0004 , PH-0003 , US-0276 , UY- 0010

Dupe of Ecma 25