Site has a program where you can input data values and it will calculate the mean, standard deviation, or plot data on a histogram.
WebMath

Goes over collecting and organizing data into frequency tables, histograms, box and whisker plots, and stemandleaf plots. Also shows finding mean, median and mode. Many include videos!
Online Math Learning

It also gives formulas, description, etc for statistics.
Wolfram Mathworld

Page with links to several resources about finding mean, median and mode, plots and graphs used in statistics and the general process of collecting data for statistic studies.
Statistics Canada

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

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

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

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

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

Interactive applet that allows a student to plot points on a graph and see how an outlier affects the regression line of the data points.
Illuminations NCTM
