A questionnaire is designed to investigate attitudes about political corruption in government. The experimenter would like to survey two different groupsRepublicans and Democratsand compare the responses to various "yes/no" questions for the two groups. The experimenter requires that the sampling error for the difference in the proportion of "yes" responses for the two groups is no more than

4

percentage points. If the two samples are the same size, what minimum sample size should be used? (Round your answer up to the nearest whole number.)n₁=n₂