AP®︎ Statistics: Topic 2.1 Flashcards

Master key terms and definitions for Topic 2.1 of AP Statistics – Tabular and Graphical Representations for the Distributions of Two Categorical Variables to help you prep for quizzes and the AP exam.

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Term

Two-Way Table / Contingency Table

Definition

Table for two categorical variables; rows and columns are categories, and each interior cell is one category combination, with row totals, column totals, and a grand total

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Two-Way Table / Contingency Table
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Table for two categorical variables; rows and columns are categories, and each interior cell is one category combination, with row totals, column totals, and a grand total

2.1.A2.1.A.1
Associated Variables
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Two categorical variables are associated when the distribution of one differs across the levels of the other

2.1.A2.1.A.3
Side-by-Side Bar Chart / Clustered Bar Chart
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Bar chart for two categorical variables with separate bars for categories of one variable within each category of the other; bars may show frequency or relative frequency

2.1.A2.1.A.2
Segmented Bar Chart
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Bar chart with one equal-length bar for each group, divided into segments for the other variable; each bar represents 100% of that group

2.1.A2.1.A.2
Mosaic Plot
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Display of a two-way table using rectangles; widths show group size, heights show conditional distribution within each group, and area shows cell frequency or joint relative frequency

2.1.A2.1.A.2
Row-Conditional Relative Frequencies
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Conditional proportions or percentages found by dividing each cell in a row by that row total

2.1.A2.1.A.1
Column-Conditional Relative Frequencies
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Conditional proportions or percentages found by dividing each cell in a column by that column total

2.1.A2.1.A.1