College Board-Aligned Original Notes
AP Statistics Unit 3 Topic 1: Planning a study
Use Planning a study across graphical, numerical, algebraic, and verbal representations.
Unit 3: Collecting Data. College Board exam weighting listed for this unit: 12%-15% of Score.
What to Know
- Check the conditions of a theorem or method before applying it.
- Show the setup before the calculation.
- Interpret the result in context, including units when the problem supplies them.
- Always connect this topic back to the larger unit: Collecting Data.
Detailed Notes
Planning a study should be studied through multiple representations. A graph may show behavior quickly, an equation may make calculation possible, and a verbal interpretation explains what the result means.
In AP Statistics, AP questions often award credit for setup and reasoning, not just final answers. Write the expression, theorem, condition, or model before doing the computation.
When this topic appears in free response, check whether the question asks for a value, a rate, an interval, a comparison, or a justification. Use units and context to make the final answer precise.
Quick Practice
How would you explain Planning a study in one or two AP-style sentences?
Name the concept, apply it to a specific example or source, and explain the reasoning that connects the evidence to your answer.
Related Topics in This Unit
- Sampling methods
- Sources of bias in sampling methods
- Designing an experiment
- Interpreting the results of an experiment