I would like to know how to get the sum of squared deivation, variance and standard deviation for the following numbers:

1,112; 1,245; 1,361; 1,372; 1,472

The sum square, \Sigma x^2, is obtained when you square each term, and add them up.

Variance can be obtained using this equation:

\sigma ^2 = \frac{\Sigma x^2}{n} - \(\frac{\Sigma x}{n} \)^2

Standard deviation can be obtained from this:

\sigma = \sqrt{\frac{\Sigma x^2}{n} - \(\frac{\Sigma x}{n} \)^2}