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Section 12.2 Comparing Two Proportions

Section 12.2 Comparing Two Proportions. AP Statistics. Our inferential work so far…. Has been about the distribution of sample means and the distribution of the difference of sample means. and the distribution of sample proportions. The sampling distribution of the difference of proportions.

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Section 12.2 Comparing Two Proportions

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  1. Section 12.2Comparing Two Proportions AP Statistics

  2. Our inferential work so far… • Has been about the distribution of sample means • and the distribution of the difference of sample means. • and the distribution of sample proportions

  3. The sampling distribution of the difference of proportions

  4. If these conditions are met, the sampling distribution of difference of proportions is approximately normal The shape of the sampling distribution of difference of proportions

  5. Two proportion confidence interval

  6. Example • A study investigated the effect of pre-school on use of social services. • What is the 95% confidence interval?

  7. Calculate the Confidence Interval 3: Calculations 1: Populations & Parameter of Interest 2: Procedure Name & Conditions 4: Interpret

  8. 3: Calculations 1: Population, Parameter of Interest, H0 and Ha 2: Procedure Name & Conditions 4: Interpret

  9. 3: Calculations 1: Population, Parameter of Interest, H0 and Ha 2: Procedure Name & Conditions 4: Interpret

  10. Assignment • Section 12.3: 12.23-12.33 odd • Chapter Review: 12.35-12.45 odd

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