If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Experiment designs

AP.STATS: VAR‑3 (EU), VAR‑3.C (LO), VAR‑3.C.1 (EK), VAR‑3.C.2 (EK), VAR‑3.C.7 (EK), VAR‑3.C.9 (EK)


Rita teaches environmental biology. She has 2 forms of a midterm exam, and she wonders if either form is harder than the other. She teaches approximately 200 total students in 4 sections of the class. She randomly assigns half of the students in each section to each form of the exam. Rita will then see if the average scores are significantly different between each form.
What type of experiment design is this?
Choose 1 answer: