Question 1135683
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<pre>


The sample variance is defined by

    {{{(1/N)*sum((x[i]-m)^2,  i=1,  N)}}}

where m the sample mean and N is the sample size.



Sample standard deviation is

    {{{sqrt(sum((x[i]-m)^2,  i=1,  N)/(N-1))}}}.
</pre>

There are numerous Internet sites allowing online (free of charge) calculations.


For example, this one


https://www.calculator.net/statistics-calculator.html