Back to Making Inferences and Justifying Conclusions — Problem 3 · Task Set 36

HSS.IC Tutor Intake - Sampling, Study Design, and Statistical Inference

This short check helps your tutor understand where to start with statistical inference. Answer each question without help. If you are not sure, give your best try.

Grade 11·12 problems·~15 min·Common Core Math - HS Statistics and Probability·domain·ic

Work through problems with immediate feedback

Study Design

A drug is tested by randomly assigning treatment and control groups,
but the 200 subjects were unpaid volunteers, not randomly selected.
The treatment group does significantly better. What is justified?

The drug works for the volunteers studied, but the result may not
generalize to the whole population.

The drug works for everyone in the population, because the study
was randomized.

Nothing can be concluded, because volunteers were used.

The result generalizes to the population but does not show the
drug caused the improvement.