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<math>S.D= \sqrt \frac {\sum(x-\bar{x})^2}{(n-1)} </math>
<math>S.D= \sqrt \frac {\sum(x-\bar{x})^2}{(n-1)} </math>
where <math> \bar{x} </math> is the sample mean of x and n is the total numbers in the given data.
where <math> \bar{x} </math> is the sample mean of x and n is the total numbers in the given data.
*It is calculated using <math> "n-1" </math> method.
*It is calculated using "n-1" method.
*This function consider our given data as the sample population.
*This function consider our given data as the sample population.
*Suppose it consider the data as the entire population, we can use the [[Manuals/calci/STDEVPA | STDEVPA ]] function.
*Suppose it consider the data as the entire population, we can use the [[Manuals/calci/STDEVPA | STDEVPA ]] function.