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  Post-hoc Statistical Power Calculator for Multiple Regression

This calculator will tell you the observed power for your study, given the observed alpha level, the number of predictors, the observed R2, and the sample size.

For more information about this calculator, including properties, formulae, and references, please click here.

Please supply the necessary parameters, and then click the 'Calculate' button.

Alpha Level: Also known as the p-value, probability, or type I error rate. By convention, this value should be less than or equal to 0.05 to claim statistical significance.
Number of Predictors: The total number of predictors in the model, not including the regression constant.
Observed R2: The model R2.
Sample Size: The total number of valid cases used in the analysis.

 
 
 
 
The Statistics Calculators index now contains 50 free statistics calculators.

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