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Chapter 15: Chi-Square Tests
Figure 15-22:
Shaded Critical Region for
Example 15-5
Section Review
The next section deals with the chi-square test for independence between
two categorical variables.
15 -4 The Chi-Square Test for Independence
The chi-square test can be used both as a test of goodness-of-fit by
comparing frequencies of one variable to its theoretical expectations and as a
test of independence by comparing frequencies of one categorical variable
for different values of a second categorical variable. The underlying
computations in the tests are the same with the only difference being in the
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