providing accurate calculations for 15+ years!
Calculator: A-priori Sample Size for Hierarchical Multiple Regression
A-priori Sample Size Calculator for Hierarchical Multiple Regression
This calculator will tell you the minimum sample size required for a hierarchical multiple regression analysis; i.e., the minimum sample size required for a significance test of the addition of a set of independent variables B to the model, over and above another set of independent variables A. The value returned by the calculator is the minimum sample size required to detect an effect of the specified size, probability level, and power level for the addition of set B to the model.
Please enter the necessary parameter values, and then click 'Calculate'.