Answer
The degrees of freedom for the chi-square test of independence are based on the size of the contingency table. The formula for the degrees of freedom is (Rows-1)(Columns-1) .
Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition
by Bluman, Allan
Published by
McGraw-Hill Education
ISBN 10:
0078136334
ISBN 13:
978-0-07813-633-7
Chapter 11 - Other Chi-Square Tests - 11-2 Testing Using Contingency Tables - Exercises 11-2 - Page 633: 2
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