---
title: "AP Statistics Key Terms"
description: "733 AP Statistics key terms and definitions organized by AP® Course and Exam Description unit."
canonical: "https://fiveable.me/ap-stats/key-terms"
type: "key-terms-hub"
subject: "AP Statistics"
---

# AP Statistics Key Terms

## Overview

733 AP Statistics key terms and definitions organized by AP® Course and Exam Description unit.

## Units

- [Unit 1: Unit 1 – Exploring One–Variable Data and Collecting Data](/ap-stats/key-terms/unit/1): 177 terms across 13 topics
- [Unit 2: Unit 2 – Probability, Random Variables, and Probability Distributions](/ap-stats/key-terms/unit/2): 103 terms across 12 topics
- [Unit 3: Unit 3 – Inference for Categorical Data: Proportions](/ap-stats/key-terms/unit/3): 218 terms across 15 topics
- [Unit 4: Unit 4 – Inference for Quantitative Data: Means](/ap-stats/key-terms/unit/4): 170 terms across 10 topics
- [Unit 5: Unit 5 – Regression Analysis](/ap-stats/key-terms/unit/5): 65 terms across 5 topics

## Related Resources

- [AP Statistics subject hub](/ap-stats)
- [All AP® key terms](/key-terms)

## About This Document

Canonical Fiveable pages are available as Markdown at the same path plus `.md`.

- [llms.txt](https://fiveable.me/llms.txt): index of Fiveable's sections and URL patterns
- [llms-full.txt](https://fiveable.me/llms-full.txt): complete subject and unit listing
- [MCP server](https://fiveable.me/mcp): call Fiveable as tools instead of fetching pages (`https://fiveable.me/api/mcp`)
- [MCP server for AP teachers](https://fiveable.me/mcp/teachers): a teacher's classes, assignments and AP-rubric grading (`https://fiveable.me/api/mcp/teacher`)