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

You can search this electronic textbook for statistics topics including ANOVA, linear regression models, the effects of outliers, confidence intervals, etc. Gives explanations and discusses the topics.
StatSoft

This website provides graphical displays, an index of online calculators and summaries of main topis in statistics.
Statistics to Use

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

Definition of Quartiles, Five number summary, and Boxplot
Percentiles
zscores
Quartiles, boxplots, percentiles, and zscores

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

Central Limit Theorem Tutorial
Intro to the Central Limit Theorem Tutorial

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
