AP®︎ Statistics (pre-2026): Topic 1.10 Flashcards

Master key terms and definitions for Topic 1.10 of AP Statistics (pre-2026) – The Normal Distribution 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This course has been archived.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

Parameter

Definition

A numerical summary that describes a population, such as μ or σ.

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Parameter
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A numerical summary that describes a population, such as μ or σ.

VAR-2.AVAR-2.A.1
Empirical Rule
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About 68%, 95%, and 99.7% of values lie within 1, 2, and 3 standard deviations.

VAR-2.AVAR-2.A.3
Finding Proportions in a Normal Distribution
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Use z-scores with a calculator, z-table, or software to find area under the curve.

VAR-2.BVAR-2.B.3
Finding a Value from a Given Normal Area
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Use inverse normal technology with a mean, standard deviation, and area to estimate a data value.

VAR-2.BVAR-2.B.4
Shifting and Rescaling Data
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Adding or subtracting shifts center; multiplying or dividing rescales spread without changing shape.

VAR-2.A
Variables Commonly Modeled by a Normal Distribution
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Many real variables, like body temperature or loaf weight, can be approximated by a normal model.

VAR-2.AVAR-2.A.4
Approximately Normal Distribution
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A distribution that is roughly symmetric, unimodal, and mound-shaped, like a normal curve.

VAR-2.AVAR-2.A.2
Normal Distribution Parameters
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Its center is set by μ, spread by σ, and the standard model is N(0,1).

VAR-2.AVAR-2.A.2
Z-Score
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A standardized value found by subtracting the mean and dividing by the standard deviation.

VAR-2.BVAR-2.B.2
Percentiles and Z-Scores
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Measures of relative position used to compare observations within or between distributions.

VAR-2.CVAR-2.C.1