Independence Testing

Introduction We can use the method described in Goodness of Fit to determine whether two sets of data are independent of each other. We organize the data in what are called contingency tables, as described in Example 1. In these cases df = (row count – 1) (column count – 1). Excel worksheet function Excel … Read More

Chi-square and F Distributions

Topics Chi-square Distribution One Sample Hypothesis Testing of the Variance Power of One Sample Variance Testing Goodness of Fit Independence Testing Fisher’s Exact Test Simulation Chi-square Test Effect Size for Chi-square Testing Boschloo Exact Test 2 × 2 Contingency Table Testing Cochran-Armitage Test Cochran-Mantel-Haenszel Test Noncentral Chi-square Distribution Power of Chi-square Tests Confidence Interval for … Read More

Iterative Proportional Fitting Procedure (IPFP)

Two-way contingency tables We now define an algorithm that lets us compare two-way tables which have different row and/or column totals. We explain the algorithm using the following example. Example 1: Revise the table in range A5:D7 of the following figure so that the sum of each of the rows is the indicated row total … Read More