What does the two-way chi-square test measure?
a. Whether one variable seems related to another one
b. Whether two variables cause one another
c. Whether an intervention changes the dependent variable's value
d. Change over time
ANS: A
The chi-square (?²) test compares differences in proportions of nominal level variables. A two-way chi-square is a statistic that tests whether proportions in levels of one variable are significantly different from proportions of the second variable. In other words, it detects whether one nominal variable seems to be related to another one.
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