AP®︎ Statistics (pre-2026): Topic 9.6 Flashcards

Master key terms and definitions for Topic 9.6 of AP Statistics (pre-2026) – Skills Focus: Selecting an Appropriate Inference Procedure 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This course has been archived.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

Inference Procedure Selection

Definition

Choose the method by identifying parameter type, number of samples, design, and variable type.

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Inference Procedure Selection
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Choose the method by identifying parameter type, number of samples, design, and variable type.

Confidence Interval vs Hypothesis Test
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Estimate a plausible parameter range with an interval, or evaluate a claim with a test.

One Proportion Z Procedures
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Use for one population proportion; z-interval estimates it, z-test compares it to a claimed value.

One Sample T Procedures
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Use for one population mean; t-interval estimates it, t-test compares it to a claimed value.

Two Proportion Z Procedures
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Use for comparing two population proportions; z-interval estimates difference, z-test tests claimed difference.

Chi-Square Goodness of Fit Test
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Tests whether one categorical variable's distribution matches a claimed distribution.

Chi-Square Test for Independence
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Tests whether two categorical variables are associated in one population.

Chi-Square Test for Homogeneity
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Tests whether categorical distributions are the same across multiple populations or treatments.

Linear Regression T Procedures
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Use for slope inference in least-squares regression; interval estimates slope, test checks if slope equals zero.

How To Distinguish The Three Chi-Square Tests
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Goodness of fit compares one distribution, independence checks association, homogeneity compares group distributions.

Categorical vs Quantitative Inference
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Use z procedures for categorical proportions and t procedures for quantitative means.

Choosing Between Matched Pairs and Two-Sample T Procedures
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Use paired differences for linked data and two-sample methods for independent groups.

Recognizing Regression Inference
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Use slope inference for two quantitative variables, often using regression computer output.