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MPA508: Statistics for Public Managers: Statistics with Grouped Data

Contingency Tables and Chi-squares

CHI-SQUARE AND TESTS OF CONTINGENCY TABLES
to help get a grasp on contingency tables…
Contingency Table: The Why and Wherefores
how to calculate expected values in a chi-square table
Research Rundowns: Significance Testing (t-tests)
Good description of significance testing, using an example with a t-test
Chi-square caculator