Statistics and Probability
This web site provides training and tools to help you solve
statistics problems quickly, easily, and accurately - without
having to ask anyone for help.
Learn at your own pace. Free statistics tutorials cover
and survey sampling - all explained in plain English.
AP Tutorial: Read 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.
Study guide: Read our review of the most popular AP study guides,
and choose the right guide for you.
Compare AP-approved graphing calculators, based on price and user
Create a list of random numbers, based on your specifications.
- Control list size (generate up to 1000 numbers).
- Specify the range of values that appear in your list.
- Permit or prevent duplicate entries.
Free and easy to use.
Create powerful, cost-effective survey sampling plans.
- Find the optimum design (most precision,
- 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.