Back to Use measures of center and measures of variability to draw informal comparative inferences about two populations — Problem 2 · Task Set 39

7.SP.B.4 Tutor Intake -- Comparing Two Populations with Center and Variability

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·~12 min·Common Core Math - Grade 7·standard·7-sp-b-4

Work through problems with immediate feedback

Concepts

A data set's median word length is used to describe its center.
Which measure of variability should be paired with the median,
and why?

IQR — both the median and IQR are based on the position of values, not their arithmetic average

MAD — a higher MAD always means the data is less trustworthy

Range — range and median were introduced in the same grade

It doesn't matter which variability measure is used with the median