Math with Bad DrawingsCartoon Archive

Why Not to Trust Statistics: Variance

July 13, 2016Original blog post

Disastrous results are excused as 'a lot of variance', but the spread is one outlier among uniformly terrible results.

Use this cartoon

Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.

Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2016-07-13-why-not-to-trust-statistics--variance/ (CC BY-NC 4.0)
Transcript

Variance: "These results are a disaster!" "Sure, they look bad, but there's a lot of variance! Don't rush to judgment."

[Distribution: almost everything at "terrible results," one "outlier" at "great results"]

Topics
Statistics › Statistical LiteracyStatistics › Variance & Standard DeviationStatistics › Outliers
Level
Middle SchoolHigh SchoolAP Statistics
Themes
Money & ShoppingWork & JobsVisual Explanations