how to calculate variance of data in excel?
['Summary. The Excel VAR function estimates the variance of a sample of data. ... ', 'Get variation of a sample.', 'Computed variance.', '=VAR (number1, [number2], ...)', 'number1 - First number or reference. number2 - [optional] Second number or reference.', 'The VAR function estimates the variance for a sample of data.']