AP®︎ Statistics (pre-2026) Unit 1: Notes & Study Guide
Prepare for your quiz, test, or the AP exam with a comprehensive review on Unit 1 of AP Statistics (pre-2026) – Exploring One-Variable Data.
Unit 1: Exploring One-Variable Data
How to describe and summarize a single variable using graphs, center, spread, and shape.
Begin with Topic 1.1: Introducing Statistics: W...To review Unit 1, go through each of the 10 topics below.
Everything you actually need to know for your Unit 1 test, pulled directly from the AP® Statistics (pre-2026) curriculum.
Introducing Statistics: What Can We Learn from Data?
Introducing Statistics: What Can We Learn from Data?
- What Statistics Is and What Data Tell Us
- Numbers Only Matter in Context
- The W’s of Data Context
The Language of Variation: Variables
The Language of Variation: Variables
- What a Variable Is
- Types of Variables
- Identifying Variables in Context
Representing a Categorical Variable with Tables
Representing a Categorical Variable with Tables
- Frequency Tables and Relative Frequency Tables
- Constructing the Tables Correctly
- What Tables Reveal About Categorical Data
Representing a Categorical Variable with Graphs
Representing a Categorical Variable with Graphs
- Bar Graphs for One Categorical Variable
- Pie Charts and Other Displays of Categorical Data
- Describing a Distribution of Categorical Data
Representing a Quantitative Variable with Graphs
Representing a Quantitative Variable with Graphs
- Discrete vs Continuous Variables
- The Main Graphs for Quantitative Data
- Choosing the Right Graph
Describing the Distribution of a Quantitative Variable
Describing the Distribution of a Quantitative Variable
- What It Means to Describe a Distribution
- Shape and Unusual Features
- Center of a Distribution
Summary Statistics for a Quantitative Variable
Summary Statistics for a Quantitative Variable
- What Summary Statistics Are
- Measures of Center and Position
- Measures of Variability
Graphical Representations of Summary Statistics
Graphical Representations of Summary Statistics
- The Five-Number Summary
- Boxplots
- Shape and the Mean–Median Relationship
Comparing Distributions of a Quantitative Variable
Comparing Distributions of a Quantitative Variable
- What It Means to Compare Distributions
- Comparing Graphical Displays
- Comparing Numerical Summary Statistics
The Normal Distribution
The Normal Distribution
- What a Normal Distribution Is
- The Empirical Rule and What It Tells You
- Z-Scores and Standardizing Values
Notes
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