A study reports that students who eat breakfast daily score an average of 8 points higher on a standardized test than students who skip breakfast. The study was observational. Which of the following is the most appropriate conclusion?
FAQ
AP Statistics questions, answered.
What's on the AP Statistics Exam?+
The AP Statistics Exam is 3h long: Multiple choice (42 questions, 90 minutes, 50% of the score) and Free response (4 questions, 90 minutes, 50% of the score). These figures come from College Board's AP Statistics exam page.
Are these AP Statistics notes free?+
Unit 1 is free to read in full, and every other unit shows its first topic free. A free 7-day trial opens all 5 units and the full-length practice tests.
How many units are in AP Statistics?+
AP Statistics has 5 units: Unit 1, Exploring One-Variable Data and Collecting Data; Unit 2, Probability, Random Variables, and Probability Distributions; Unit 3, Inference for Categorical Data: Proportions; Unit 4, Inference for Quantitative Data: Means; Unit 5, Regression Analysis.
When is the AP Statistics Exam?+
AP Exams are held over two weeks every May. College Board publishes the schedule for each year; the AP exam calendar lists the dates once they are announced.
How is the AP Statistics Exam scored?+
AP Exams are scored from 1 to 5. The AP Statistics score calculator estimates your score from your results on each section.
Ready for a 5? Start free today.
7 days free — $0.00 due today. Every AP Statistics unit and full-length test, plus 18 more AP subjects.