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
statistics, probability,
and survey sampling - all explained in plain English.
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AP Tutorial: Read our free, AP statistics tutorial to improve
your skills in all test areas.
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Practice exam: Test your understanding of key topics,
through sample problems with detailed solutions.
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Study guide: Read our review of the most popular AP study guides,
and choose the right guide for you.
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Calculator:
Compare AP-approved graphing calculators, based on price and user
ratings.
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Analytical Tools
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.
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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.
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Probability Calculators