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 522 randomly selected Texans surveyed, 355 were in favor of the initiative and of the 546 randomly selected New Yorkers surveyed, 460 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 522 randomly selected Texans and 546 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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