Standard deviation is a statistic measuring the dispersion of a dataset relative to its mean. It is calculated as the square root of the variance. Learn how it's used.

Variance is also used in finance to compare the relative performance of each asset in a portfolio to achieve the best asset allocation. The square root of the variance is the standard deviation.

When you have the average production of three machines, it is easy to calculate the average or mean production. You just add ...

However, there are inherent differences between the two. While standard deviation measures the square root of the variance, the variance is the average of each point from the mean.

Learn the standard deviation formula, how to calculate it, and its importance in data analysis. Step-by-step guide with examples.

Understanding standard deviation means first understanding variance because standard deviation, mathematically speaking, is the square root of variance.

The standard deviation is calculated by finding the mean, calculating the variance and taking the square root of the variance.

Calculating standard deviation manually can be time-consuming and complex. Excel's STDEV formula can automatically calculate the standard deviation of any set of numbers, so you don't have to go ...