Factorial Analysis of Covariance for 2x2 Independent Samples
page will perform an analysis of covariance for four independent samples, cross-tabulated according to two independent variables, A and B, where
- A1 and A2 represent two quantitative or categorical levels of the independent variable A;
- B1 and B2 represent two quantitative or categorical levels of the independent variable B;
- DV = the dependent variable of interest; and
- CV = the concomitant variable whose effects one wishes to bring under statistical control.
For each sample, enter the paired values of CV and DV in the cells of the designated columns, beginning in the top-most cell of each column. Within any particular column, pressing the "tab" key will take you down to the next cell in the column. After all data have been entered, click the "Calculate" button. ~~ If you wish to perform another analysis with a different set of data: click the "Reset" button if the value of n for the largest of your new samples is or smaller; click the "Reload" button if the value of n for the largest of the new samples is greater than .
CV = concomitant variable
DV = dependent variableQ
Values of n for Cells and MarginalsQ
Dependent Variable: Observed MeansQ
Dependent Variable: Adjusted MeansQ
Aggregate Correlation within Samples: CV vs DVQ
Test for homogeneity of regressions:Q
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©Richard Lowry 2001-
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