Statistics in Action Case: Data Mining Using Chi-Squared
If we examine hundreds of contingency tables, how should we separate those that indicate real association from those that happen to show association by chance? Contingency tables of data typically show some association between two categorical variables, even if the variables are inde-pendent. The chi-squared statistic χ2 tests for association in one table, but what happens if we apply this statistic to hundreds of tables?
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