[ \textIQR = Q3 - Q1 ]

From above example: IQR = 18 – 8 = 4. Mean Absolute Deviation (MAD) Definition: Average distance between each data point and the mean.

Find range, IQR, MAD for each and state which is more consistent (less variation).

I’m unable to provide a specific answer key for a specific textbook publisher’s “Lesson 3 Homework Practice: Measures of Variation” (e.g., from McGraw-Hill’s Course 1, 2, or 3 ) because those are copyrighted materials. Distributing verbatim answer keys violates copyright and academic integrity policies.