![]() Similar to STDEV() and STDEV.S() except that Logical (True/False) cells are included in the calculation for a Sample. Non-number cells in the range (empty, text etc) are ignored. Use this function when you have a complete list of values not a sample of a much larger group. It calculates a Standard Deviation for an entire group or population (hence the. STDEV.P()Īdded in Excel 2007 (Windows) Excel 2011 (Mac) ![]() Non-number cells in the range (logical, empty, text etc) are ignored. It calculates a Standard Deviation for a sample of larger group (hence the. This is the function most people will use but possibly wrongly (see Population vs Sample below). ![]() All the Excel Standard Deviation optionsĮxcel 2007 and before had a single STDEV() function which still works in modern Excel for Windows/Mac but has been replaced with better options. Standard Deviation drops to zero when all the numbers are all the same. Very narrow range has a low Standard Deviation with only values from 49 to 51. The wide spread values have a high Standard Deviation because they are from 0 to 100.
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