Question: what is the difference between standard deviation in excel?
Answer: STDEVP and STDEVPA return population standard deviation, whereas STDEV and STDEVA return sample standard deviation. In all versions of Excel, a value is calculated first for VAR, VARA, VARP, or VARPA. The square root of this value is returned (respectively) for STDEV, STDEVA, STDEVP, or STDEVPA.