The health inspector would like to know if these data provide convincing evidence that the distribution of strep throat status differs across the departments in the population of all workers of this large company. What is the appropriate inference procedure?
Answer
A
chi-square test for goodness of fit because the data come from one random sample
B
chi-square test for association/independence because the data come from one random sample
C
chi-square test for association/independence because the data come from independent random samples
D
chi-square test for homogeneity because the data come from independent random samples
Explanation
The question compares two categorical variables: strep throat status and department. Since the data come from one random sample of workers, the appropriate procedure is a chi-square test for association (also called a test of independence). A test of homogeneity is used when comparing distributions across independent samples.
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