======Statistical Calculators ======
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  * [[http://www.stat.uiowa.edu/~rlenth/Power/index.html|Java applets for power and sample size]]
Each selection provides a graphical interface for studying the power of one or more tests. They include sliders (convertible to number-entry fields) for varying parameters, and a simple provision for graphing one variable against another.
 
  * [[http://survey.scantron.com|Survey Research Tools Scantron Page]]
Sample Size and Confidence Interval Calculator, Significant Difference Calculator
 
  * [[http://calculators.stat.ucla.edu|UCLA Statistical Calculators List]]
Includes calculators for Power, Two Sample t-test, Correlation and Regression, Sample Size.
 
  * [[http://statpages.org/|Web Pages that Perform Statistical Calculations!]]
Compiled by John C. Pezzullo. Over 600 Links (including 380 Calculating Pages).