Standard Deviation

[diesel]

Hi,

Could someone please tell me how to calculate standard deviation.

Thanks.

[mattc]

1. Find the mean of the values.

2. For each value xi calculate the deviation (xi-mean).

3. Calculate the squares of these deviations.

4. Find the mean of the squared deviations. This is the variance .

5. Take the square root of the variance.

[commando]

Here's a pretty good example:

Standard Deviation Calculation (http://standard-deviation.appspot.com/)