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This page will perform a ttest for the significance of the difference between the observed mean of a sample and a hypothetical mean of the population from which the sample is randomly drawn. The user will be asked to...
For a table of frequency data crossclassified according to two categorical variables, X and Y, each of which has two levels or subcategories, this page will calculate the Phi coefficient of association; perform a...
This page will calculate the value of chisquare for a one dimensional "goodness of fit" test, for up to 8 mutually exclusive categories labeled A through H. To enter an observed cell frequency, click the cursor into...
This page will calculate standard measures for Rates, Risk Ratio, Odds, Odds Ratio, and Log Odds. It will also calculate the Phi coefficient of association; perform a chisquare test of association, if the sample size...
This page, by Richard Lowry of Vassar College, will calculate the intercorrelations (r) for any number of variables (V1, V2, V3, etc.) and for any number of observations per variable. Visitors will also find a link to...

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