Confidence interval estimate for population proportion

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In a survey of 2,395 adults, 1,916 reported that e-mails are easy to misinterpret, but only 1,269 reported that telephone conversations are easy to misinterpret. (Data extracted from "Open to Misinterpretation," USA Today, July 17, 2007, p. 1D.)

a) Construct a 95% confidence interval estimate for the population proportion of adults who report that e-mails are easy to misinterpret.

b) Construct a 95% confidence interval estimate for the population proportion of adults who report that telephone conversations are easy to misinterpret.

c) Compare the results of (a) and (b).

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