What is the difference between Variance and Standard Deviation?

The variance gives a measure of how data distributes itself around the expected value, and it considers all the data at all points. A measure of the dispersion of views within a data set is a standard deviation. Variance is the average of squared deviations, and the standard deviation is the root mean square difference. Variation is expressed in square units.

Standard deviation is demonstrated in the same units as the values in the set of data. Variance indicates how far individuals in a group are spread out. The standard deviation shows how much observations of a data set differs from it's mean.