Khan Academy: Variance and Standard Deviation: Sample Variance

Does standard deviation work for non-symmetrical distributions, and what does it mean? Through the use of examples, high schoolers determine the standard deviation of a variety of distributions and interpret its...

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...

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

Use variable value sliders to understand variance. The interactive shows four whole numbers, their mean and deviation. Using the information, pupils find the variance of the numbers and respond to question related to the understanding of...

Presents a problem that is similar to what might be on an AP Statistics exam. Walks students through each step for solving it and students input answers to questions along the way.

Standard error means ... it's okay to be wrong? Viewers learn how to calculate standard error from the standard deviation and the number of data values, both by hand and by using spreadsheets. The video also shows how to display this...

This video demonstrates how to take linear equations written in either slope-intercept form or point-slope form and rewrite them in standard form of a linear equation. Right-click on the square at the bottom right for a full-screen view....

This video uses a simulation to better understand why we divide by n-1 when we calculated an unbiased sample variance. When we are in an unbiased way trying to estimate the true population varience.

Video first briefly reviews the effect on the sampling distribution when the sample size increases then gives the formula for variance of the sample mean of the sampling distribution and formula for standard error of the mean.

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