In which of the following situations are contingency tables used?
A) to test independence of two samples
B) to test dependence in matched pairs
C) to test independence of two qualitative variables in a population
D) to describe a single population

Question

Quizplus · Accepted Answer

Contingency tables are used to test the independence of two qualitative variables in a population by examining the frequency distributions of the observed data. Option A and B are about testing for dependence or independence between variables, but do not specifically mention the use of contingency tables. Option D is incorrect because contingency tables involve comparing two variables, not just describing a single population.

In Which of the Following Situations Are Contingency Tables Used