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.

Analytical Tools

Random numbers

Random Number Generator

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. > Learn more

Sample Planning Wizard

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. > Learn more

Wizard hat