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This page, created by Richard Lowry of Vassar College, will perform a twoway factorial analysis of variance for designs in which there are two to four randomized blocks of matched subjects, with two to four repeated...
In the first simulation, random samples of size n are drawn from the population one sample at a time. With df=3, the critical value of chisquare for significance at or beyond the 0.05 level is 7.815; hence, any...
In this applet, A and B are subsets of a universal set S. The list is given of the 16 different subsets of S that can be constructed from A and B using the basic set operations of union, intersection, and complement....
This tutorial, by David Polson of Athabasca University, introduces 9 sources of threat to internal validity in Part 1 and asks the user to classify hypothetical experiments as either internally valid or invalid and...
This introductory statistics introduction, by StatSoft, gives an overview of variables, classifications, measurements, relations, and other basic statistical concepts. There are also two animated graphs illustrating...

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