Answer
In the goodness-of-fit-test, the degrees of freedom are equal to the number of categories minus 1. For example, if the sample size n = 5, the degrees of freedom are 5-1=4.
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 - 11-1 Test for Goodness of Fit - Exercises 11-1 - Page 619: 2
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