Khan Academy: Variance and Standard Deviation of a Discrete Random Variable

Continuing his conversation about data sets from the previous video, Sal introduces range, variance, and standard deviation as means of dispersion. Those advancing in algebra or beginning a statistics class will benefit from Sal's clear...

What if math teachers are really pirates and they want us to find x so they can get the buried treasure? A short video explains how to calculate standard deviation and variance with a step-by-step guided practice problem. The...

Example showing how to find the mean and standard deviation of a binomial random variable.

[Free Registration/Login may be required to access all resource tools.] Calculate the variance and standard deviation of a data set.

This video shows how to find a population mean from a set of data and the compute the population variance.

This video shows how to estimate the variance of a population by looking at the data in a sample.

Page centered around a computer program to determine mean, variance, and standard deviation.

A video [4:31] explaining how to find the mean or expected value of a discrete random variable.

Example of transforming a discrete random variable.

Finding the mean (or expected value) of a discrete random variable.