A researcher studies 45 volunteer citizens from a small community and asks them about the amount of caffeine (in milligrams) they ingest before and after lunch each day, a phenomenon assumed to be normally distributed.Which assumption for the paired-samples t test is NOT met in this research design?

Question

Quizplus · Accepted Answer

The paired-samples t-test does not require participants to be randomly selected from the population; it requires that the data for the dependent variable (in this case, caffeine intake) are paired and come from the same participants before and after a condition or time point. The other assumptions listed are met based on the information provided.

A Researcher Studies 45 Volunteer Citizens from a Small Community