Part 9: Inference for Two Variables
Covers: Topics 8.1 - 8.6 and 9.1 - 9.5 of the Course & Exam Description (CED)
Stats Content (CED Topics 8.1-8.3)
Problem of Multiple Tests
Chi-Square Test for Goodness of Fit
Relevant Context
Affirmative Action
College Admissions
Stats Content (CED Topics 8.4-8.6)
Chi-Square Test for Independence
Chi-Square Test for Homogeneity
Relevant Context
Police & Race
Stats Content (CED Topics 9.1-9.5)
Conditions for Regression Inference
t-Interval for a Regression Slope
t-Test for a Regression Slope
Relevant Context
Gun Control
Gun Violence
Quizzes for Part 9 (Inference for Two Variables)
Quiz Format (Versions A & B)
Multiple Choice: 10 items. Recommended time: 23 minutes.
Free Response: 2 items. Recommended time: 26 minutes.
Quiz Links: Access the quizzes here.
Mock AP® Exams
Mock exam format (same format as AP® Exam)
All questions are secure items from prior official AP® Stats practice exams
Multiple choice: 40 items. Time to complete: 90 minutes.
Free Response: 6 items. Time to complete: 90 minutes.
Recommended usage:
Use one version as a diagnostic, before AP® Exam review
Use the other two versions as practice for exam day
Exam links: Access the mock exams here.