LEARN · EXPLAIN · REVISE

An anonymous commute survey records 20k students; 12k travel at most 30 minutes. Find the sample proportion.

Read the idea, work independently, then explain what changed.

TOPIC 01

Statistics: mixed assessment

A mixed assessment: identify the method, justify it and revise your reasoning.

Use one hint at a time. A correction explains what changed, not just the final answer.

01 / Transfer#Your turn

k=11

Skills and prerequisite lessons

Working and explanation

BUILD THE REASONING

Hint 1

State the survey question, population, sampling and measurement rules before drawing a conclusion.

Hint 2

Count the students meeting the stated inclusive threshold.

Worked solution

State the survey question, population, sampling and measurement rules before drawing a conclusion.
Calculate or simplify this relation.
$\hat p=132/220=0.6$
The measured outcome is duration, not distance.

The requested value is 0.6.

Checks and common pitfalls: The measured outcome is duration, not distance.

Think first. Reveal a hint when the class is ready.

Teacher preparation and assessment