A newsgroup is interested in constructing a 95% confidence interval for the difference in the proportions of Texans and New Yorkers who favor a new Green initiative. Of the 569 randomly selected Texans surveyed, 406 were in favor of the initiative and of the 558 randomly selected New Yorkers surveyed, 462 were in favor of the initiative. a. With 95% confidence the difference in the proportions of Texans and New Yorkers who favor a new Green initiative is between (round to 3 decimal places) and (round to 3 decimal places). b. If many groups of 569 randomly selected Texans and 558 randomly selected New Yorkers were surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population proportion of the difference in the proportions of Texans and New Yorkers who favor a new Green initiative and about percent will not contain the true population difference in proportions.

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### Constructing a 95% Confidence Interval for the Difference in Proportions

A newsgroup is interested in constructing a 95% confidence interval for the difference in the proportions of Texans and New Yorkers who favor a new Green initiative. The surveyed sample includes:

- **Texans:** Among 569 randomly selected individuals, 406 were in favor of the initiative.
- **New Yorkers:** Among 558 randomly selected individuals, 462 were in favor of the initiative.

#### a. Confidence Interval for Difference in Proportions
With 95% confidence, the difference in the proportions of Texans and New Yorkers who favor the new Green initiative is estimated to be between:
- **[ ]** (round to 3 decimal places)
- **[ ]** (round to 3 decimal places)

#### b. Interpretation of Confidence Intervals
If many groups of 569 randomly selected Texans and 558 randomly selected New Yorkers were surveyed, then each group would produce a different confidence interval. The interpretation is as follows:
- Approximately **[ ]** percent of these confidence intervals will contain the true population proportion of the difference in the proportions of Texans and New Yorkers who favor the new Green initiative.
- Approximately **[ ]** percent of these confidence intervals will *not* contain the true population difference in proportions.
Transcribed Image Text:### Constructing a 95% Confidence Interval for the Difference in Proportions A newsgroup is interested in constructing a 95% confidence interval for the difference in the proportions of Texans and New Yorkers who favor a new Green initiative. The surveyed sample includes: - **Texans:** Among 569 randomly selected individuals, 406 were in favor of the initiative. - **New Yorkers:** Among 558 randomly selected individuals, 462 were in favor of the initiative. #### a. Confidence Interval for Difference in Proportions With 95% confidence, the difference in the proportions of Texans and New Yorkers who favor the new Green initiative is estimated to be between: - **[ ]** (round to 3 decimal places) - **[ ]** (round to 3 decimal places) #### b. Interpretation of Confidence Intervals If many groups of 569 randomly selected Texans and 558 randomly selected New Yorkers were surveyed, then each group would produce a different confidence interval. The interpretation is as follows: - Approximately **[ ]** percent of these confidence intervals will contain the true population proportion of the difference in the proportions of Texans and New Yorkers who favor the new Green initiative. - Approximately **[ ]** percent of these confidence intervals will *not* contain the true population difference in proportions.
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