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

Work through problems with immediate feedback

Foundations of Inference

A news site runs an online poll where 80,000 readers choose to click
and vote. A polling firm instead randomly selects 600 voters and
interviews them. Which sample should be trusted more, and why?

The 80,000-reader poll, because a larger sample is always more
representative.

The random sample of 600, because random selection removes
systematic bias even though it is smaller.

The 80,000-reader poll, because more responses reduce both bias
and variability.

Neither, because sample size and selection method do not affect
trustworthiness.