Somewhere back in your middle school and high school math classes, you no doubt learned about the mean and standard deviation as fairly fundamental concepts in arithmetic and statistics. You also ...

Standard deviations has been used as a metric to measure total risk within the investment community. But standard deviation isn't always used correctly by investors, writes Matt McCoy.

How to calculate Standard Deviation in Excel The Standard Deviation is a term used in statistics. The term describes how much the numbers if a set of data vary from the mean.

Calculating the standard deviation and T-Value against that data set results in a realistic range against the historic data.

But since [Scott] is using the Mean and Standard Deviation to keep running totals of collected data over time it is also very useful for applications like building your own home heating thermostat.

The equation for the standard error of the mean is the sample standard deviation divided by the square root of the sample size.

Standard deviation is a statistic that all statisticians have been using for ages. It does not lie. So because fantasy football is a game of statistics, why not use statistical analysis on your side?

We discourage the use of a diagnostic for normality: the interquartile range divided by the standard deviation. This statistic has been suggested in several introductory statistics books as a method ...