Variation and distribution readiness
Read small visual data sets for spread, clusters, outliers, and typical value foundation before formal statistics.
Core · Variation and distribution readiness · Independent practice · Single Choice
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Watch: Watch whether the learner compares the occupied endpoints in both plots before choosing. The decisive evidence is 36 − 24 = 12 and 38 − 22 = 16.
Misread: A wrong median or most common time statement shows the learner compared center instead of spread; the mirror statement shows the learner mistook the overall width for asymmetry.
Curriculum: This task develops reading paired dot plots and comparing distribution spread with range, while distinguishing spread from center and shape.