Stat Trek

Teach yourself statistics

Stat Trek

Teach yourself statistics

Statistics and Probability

This website provides training and tools to help you solve statistics problems quickly, easily, and accurately - without having to ask anyone for help.

Online Tutorials

Learn at your own pace. Free online tutorials cover statistics, probability, regression, analysis of variance, survey sampling, and matrix algebra - all explained in plain English.

Practice and review questions reinforce key points. Online calculators take the drudgery out of computation. Perfect for self-study.

AP Statistics

Here is your blueprint for test success on the AP Statistics exam.

  • AP Tutorial: Study our free, AP statistics tutorial to improve your skills in all test areas.
  • Practice exam: Test your understanding of key topics, through sample problems with detailed solutions.

Be prepared. Get the score that you want on the AP Statistics test.

Random Number Generator

Produce a list of random numbers, based on your specifications.

  • Control list size (generate up to 10,000 random numbers).
  • Specify the range of values that appear in your list.
  • Permit or prevent duplicate entries.

Free and easy to use.

Random number generator

Sample Size Calculator

Create powerful, cost-effective survey sampling plans.

  • Find the optimum design (most precision, least cost).
  • See how sample size affects cost and precision.
  • Compare different survey sampling methods.
  • Assess statistical power and Type II errors.

Tailor your sampling plan to your research needs.

Sample Size Calculator

Stat Toolbox

Check out our statistical tables and online calculators - fast, accurate, and user-friendly.

Each calculator features clear instructions, answers to frequently-asked questions, and a one or more problems with solutions to illustrate calculator use.