In this video, Salman Khan of Khan Academy explains standard deviation.
Khan Academy

In this video, Salman Khan of Khan Academy explains variance of a population.
Khan Academy

This video includes sample exercises and stepbystep explanations of mean and standard deviation for the California Standards Test.
Khan Academy

Gives a detailed explanation through images on working with standard deviation and variance.
Math is Fun

Interest compounded yearly, monthly, daily, etc.
About.com: Mathematics

In this Early Edge video lesson, you'll learn more about Median, so you can be successful when you take on highschool Math & Arithmetic.
The Princeton Review

In this Early Edge video lesson, you'll learn more about Mean, so you can be successful when you take on highschool Math & Arithmetic.
The Princeton Review

In this video, Salman Khan of Khan Academy explains binomial distribution. Part 2 of 4.
Khan Academy

In this video, Salman Khan of Khan Academy explains binomial distribution. Part 1 of 4.
Khan Academy

In this video, Salman Khan of Khan Academy explains alternate variance formulas.
Khan Academy
