Psi specializes in voter polls and surveys designed

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Unformatted text preview: p) 1 n is the margin of error Example 1 Political Science, Inc. (PSI) specializes in voter polls and surveys designed to keep political office seekers informed of their position in a race. In a current election campaign, PSI has just found that 220 registered voters, out of 500 surveyed, favour a particular candidate. PSI wants to develop a 95% confidence interval estimate for the proportion of the population of the registered voters that favour the candidate. Interval Estimation Example 1 Political Science, Inc. (PSI) specializes in voter polls and surveys designed to keep political office seekers informed of their position in a race. In a current election campaign, PSI has just found that 220 registered voters, out of 500 surveyed, favour a particular candidate. PSI wants to develop a 95% confidence interval estimate for the proportion of the population of the registered voters that favour the candidate. p α=.05; zα/2 = z0.025 =1.96; = 220/500 = 0.44; n = 500 Interval Estimation Example 1 Political Science, Inc. (PSI) specializes in voter polls and surveys designed to keep political office seekers informed of their position in a race. In a current election campaign, PSI has just found that 220 registered voters, out of 500 surveyed, favour a particular candidate. PSI wants to develop a 95% confidence interval estimate for the proportion of the...
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This document was uploaded on 03/05/2014.

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