The standard deviation is a formal measure of the tendency of the numbers in your list to vary – or deviate – from the mean. You can think of it as a measure of how "spread out" your numbers are.

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

Standard deviation is a measure of how far away individual measurements tend to be from the mean value of a data set. The standard deviation of company A's employees is 1, while the standard ...

Learn the difference between the standard error of the mean and the standard deviation and how each is used in statistics and finance.

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.

The technical definition of standard deviation is somewhat complicated. First, for each data value, find out how far the value is from the mean by taking the difference of the value and the mean.

Determination There are several practical ways to calculate the mean and standard deviation. Scientific calculators typically come with a built-in program for both the mean and standard deviation.

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

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.

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