AP®︎ Statistics (pre-2026): Topic 1.9 Flashcards

Master key terms and definitions for Topic 1.9 of AP Statistics (pre-2026) – Comparing Distributions of a Quantitative Variable to help you prep for quizzes and the AP exam.

This course has been archived. The College Board updated AP Statistics for the 2026–27 school year, and the units and topics changed.
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Term

Comparing Shape

Definition

Compare whether distributions are symmetric, skewed, unimodal, or have clusters and gaps.

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Comparing Shape
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Compare whether distributions are symmetric, skewed, unimodal, or have clusters and gaps.

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Mean and Skewness Relationship
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Right-skewed distributions usually have mean above median; symmetric ones have mean near median.

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Comparing Quantitative Distributions
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Compare groups by shape, center, spread, outliers, clusters, and gaps.

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Graphs for Comparing Quantitative Data
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Histograms, stem plots, and side-by-side boxplots compare quantitative distributions across groups.

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Numerical Summaries for Comparing Groups
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Use means, medians, range, IQR, or standard deviation to compare center and variability.

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