difference between variance and standard deviation
A variance or standard deviation of zero indicates that all the values are identical. Variance is the mean of the squares of the deviations (i.e., difference in values from the mean), and the standard deviation is the square root of that variance.Standard deviation is used to identify outliers in the data.iffen âº Science âº Statistics. Standard deviation and variance are statistical measures of dispersion of data, i.e., they represent how much variation there is from the average, or to what extent the values typically deviate from the mean (average) .