AP Statistics UNIT 1: Exploring One-Variable Data UNIT 2: Exploring Two-Variable Data UNIT 3: Exploring Two-Variable Data UNIT 4: Probability, Random Variables, and Probability Distributions UNIT 5: Sampling Distributions UNIT 6: Inference for Categorical Data: Proportions UNIT 7: Inference for Quantitative Data: Means UNIT 8: Inference for Categorical Data: Chi-Square UNIT 9: Inference for Quantitative Data: Slopes