Back to Use data from a random sample to draw inferences about a population — Problem 2 · Task Set 35

7.SP.A.2 Tutor Intake -- Drawing Inferences from Random Samples

This short check helps your tutor see where to start. Work on your own,
without a calculator. If you're unsure, give your best try — the goal is
to find what to work on together, not to grade you.

Grade 7·8 problems·~11 min·Common Core Math - Grade 7·standard·7-sp-a-2

Work through problems with immediate feedback

Procedures

A researcher draws one random sample and estimates that 55% of a
population supports a new policy. What is the best way to get a
better sense of how reliable this single estimate is?

Draw several more random samples of the same size and see how much the estimates vary

Assume the 55% estimate is exact, since it came from a random sample

Round 55% to the nearest 10% to make it more reliable

Ask the same 100 people again to double-check