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Standard Deviation Calculator


Please Input Numbers (Comma separate or in separated lines):

Standard Deviation (SD) :
Variance :
Mean :
Median :
Standard Error (SE) :


Note: The standard deviation (SD) is a simple measure of the variablity of a data set. It tells you how tightly all the various examples are clustered. Smaller SD value means samples are clustered tightly, vice versa. The algorithm is as follows: Where:
      S1, S2, ... Sn are samples.
      u is the mean of the samples.
      n is the sample number.

The standard deviation is the square root of the variance.