Main content
Unit 10: Inference for categorical data: Proportions
1,900 possible mastery points
Mastered
Proficient
Familiar
Attempted
Not started
Quiz
Unit test
About this unit
How many people do you have to poll to have a 90% confidence in the outcome of an upcoming election? This unit, which covers confidence intervals and significance tests for proportions of populations, will show you how to do just that.Learn
Practice
- Conditions for a z interval for a proportionGet 3 of 4 questions to level up!
- Finding the critical value z* for a desired confidence levelGet 3 of 4 questions to level up!
- Calculating a z interval for a proportionGet 3 of 4 questions to level up!
- Sample size and margin of error in a z interval for pGet 3 of 4 questions to level up!
Learn
Practice
- Writing null and alternative hypothesesGet 3 of 4 questions to level up!
- Estimating P-values from simulationsGet 3 of 4 questions to level up!
Learn
Practice
- Writing hypotheses for a test about a proportionGet 3 of 4 questions to level up!
- Conditions for a z test about a proportionGet 3 of 4 questions to level up!
Learn
Practice
- Calculating the test statistic in a z test for a proportionGet 3 of 4 questions to level up!
- Calculating the P-value in a z test for a proportionGet 3 of 4 questions to level up!
Learn
Practice
- Making conclusions in a z test for a proportionGet 3 of 4 questions to level up!
Learn
Practice
- Type I vs Type II errorGet 3 of 4 questions to level up!
- Error probabilities and powerGet 3 of 4 questions to level up!
Learn
Practice
- Conditions for inference on two proportionsGet 3 of 4 questions to level up!
- Two-sample z interval for the difference of proportionsGet 3 of 4 questions to level up!
Learn
Practice
- Writing hypotheses for testing the difference of proportionsGet 3 of 4 questions to level up!
- Test statistic in a two-sample z test for the difference of proportionsGet 3 of 4 questions to level up!
- P-value in a two-sample z test for the difference of proportionsGet 3 of 4 questions to level up!
- Making conclusions about the difference of proportionsGet 3 of 4 questions to level up!
Up next for you:
Level up on all the skills in this unit and collect up to 1900 Mastery points!Unit test
AP® is a registered trademark of the College Board, which has not reviewed this resource.