AP®︎ Statistics: Topic 1.3 Flashcards

Master key terms and definitions for Topic 1.3 of AP Statistics – Tabular Representation and Summary Statistics for One Categorical Variable to help you prep for quizzes and the AP exam.

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Term

Frequency Table

Definition

Table listing each category of one categorical variable and the number of observational units in each category

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Frequency Table
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Table listing each category of one categorical variable and the number of observational units in each category

1.3.A1.3.A.1
Relative Frequency Table
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Table listing each category and the proportion of all included observations in that category

1.3.A1.3.A.2
Frequency
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The count of observational units in a category

1.3.A1.3.A.1
Relative Frequency
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The proportion of all included observations in a category; f/n

1.3.A1.3.A.2
Proportion / Percentage / Relative Frequency
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Equivalent part-to-whole summaries of a category's share of the total; a proportion or relative frequency can be written as a decimal, fraction, or percent

1.3.B1.3.B.1
Part-to-Part Ratio vs. Part-to-Whole Ratio
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Part-to-whole compares a category to the total; part-to-part compares one category directly to another

1.3.B1.3.B.1
Mutually Exclusive and Exhaustive Categories
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Categories do not overlap, and together they include every observation

1.3.A
Constructing a Frequency Table
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List categories, tally each observation into one category, count each category, and check frequencies sum to the number of included observations

1.3.A1.3.A.1
Constructing a Relative Frequency Table
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Divide each category frequency by the total number of included observations; the unrounded relative frequencies add to 1

1.3.A1.3.A.2
Combining Categories
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Add counts or relative frequencies of nonoverlapping categories when the combined group has a clear contextual meaning

1.3.B1.3.B.2
Largest Category vs. Majority
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The largest category has the greatest count or relative frequency; a majority is a category with more than half of all observations

1.3.B1.3.B.2
Distribution of a Categorical Variable
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The categories of a categorical variable and the amount of data in each category

1.3.B1.3.B.2