grade 12 · STAT2-006

Critique a statistical claim

Match the strength of a conclusion to sampling, assignment, measurement, and possible confounders.

Learn togetherFresh problem · seed 781397237

A survey asks only followers of a fitness account about weekly exercise. What is the strongest valid critique?

Let's work it out together.

Work through one checkpoint at a time. Your answer area opens after the reasoning.

Checkpoint 1

Identify how participants were sampled.
Checkpoint 2

Identify whether treatments were randomly assigned.
Checkpoint 3

Match causal and population claims to the design evidence actually present.

A larger response always removes design bias.The convenience sample may overrepresent people already interested in fitness.The study is invalid because every sample must include the whole population.The numerical result alone proves causation.