# Online Calculators & Tools

## Standard Deviation Calculator and formulas

Standard deviation (σ) calculator with mean value & variance online.

## Population and sampled standard deviation calculator

How to use :-Enter data values delimited with commas (e.g: 3,2,9,4) or spaces (e.g: 3 2 9 4) and press the Calculate button.

 Enter data values: Population standard deviation: Sample standard deviation: Population variance: Sample variance: Mean:

### Discrete random variable standard deviation calculator

HOw to use :-Enter probability or weight and data number in each row:

Probability Data number

 Standard deviation: Variance: Mean:

## Standard Deviation Calculator and conversion

It is a Population Sample. Related Probability Calculator Sample Size Calculator Statistics Calculator. Standard deviation in statistics, typically denoted by ,is a measure of variation or dispersion between values in a set of data.

## Discrete random variable standard deviation calculator

A discrete random variable has a countable number of possible values. The probability of each value of a discrete random variable is between 0 and 1, and the sum of all the probabilities is equal to 1. A continuous random variable takes on all the values in some interval of numbers.