HEATKEYS

User-friendly introduction to statistics, probability, and survey sampling. Free, online tutorials - a general statistics tutorial and a tutorial tailored to the Advanced Placement (AP) Statistics curriculum. Online tools - statistical tables, probab...

RANDOM.ORG offers true random numbers to anyone on the Internet. The randomness comes from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs.

GraphPad Prism is a powerful combination of biostatistics, curve fitting (nonlinear regression) and scientific graphing in one comprehensive program. Easily organize, analyze and graph repeated experiments; pick appropriate statistical tests and inte...

CDC Centers for Disease Control and Prevention - Your Online Source for Credible Health Information

test index

Statistics help and resources for students and teachers

Microsoft Excel Consulting, Online Classes, video tutorials, free macros, and walkthroughs for beginners and advanced levels. Also includes helpful tips, tricks, code, and a forum.

Random Number Generator provides free, custom random numbers for the lottery or games. Get lucky in Lotto with RandomNumbergenerator.com

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND focuses on the issues that matter most such as health, education, national security, international affairs, law and busin...

Wolfram Research, makers of Mathematica, the only fully integrated technical computing software