chapter 20: testing hypotheses about proportions ap statistics
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Chapter 20: Testing Hypotheses About Proportions
AP Statistics
Four Step Process of Inference
1. Hypothesis2. Model3. Mechanics4. Conclusion
(See Note Sheet for Detailed Explanation)
When to Reject Null and When to Fail to Reject Null
One-Tailed Test: When to Reject of Fail to Reject Null Hypothesis
Two-Tailed Test: When to Reject of Fail to Reject Null Hypothesis
Two-Tailed Test: When to Reject or Fail to Reject Null Hypothesis
Potential Problems
• Don’t base your null hypothesis on what you see in the data
• Don’t base your alternative hypothesis on what you see in the data
• Don’t make your null hypothesis what you want to show to be true
• Don’t forget to check the conditions
Hypothesis
Method
Mechanics
Conclusion
Other—Confidence Interval
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