Back to Making Inferences and Justifying Conclusions — Problem 1 · 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

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Study Design

A study draws 200 subjects at random from a city, then uses a coin
flip to place each into a treatment or control group. Which kind of
conclusion does each form of randomness make possible?

Random selection lets results generalize to the city; random
assignment lets a difference be attributed to the treatment.

Both forms of randomness do the same job, so either one alone is
enough for any conclusion.

Random selection establishes cause and effect; random assignment
lets results generalize.

Neither form of randomness affects what conclusions are
justified.