PSAT Math Multiple-Choice Question 255: Answer and Explanation

Question: 255

A study separated two groups into people who drink coffee in the morning and people who drink tea in the morning. Researchers compared how people felt four hours after waking up. What type of study is this?

• A. Census
• B. Survey
• C. Experiment
• D. Observational study

Correct Answer: C

Explanation:

The correct solution is experiment; there are assigned groups and the groups are compared after drinking coffee or tea. See Lesson: Statistical Measures.