researcher expects the population proportion of Cubs fans in Chicago to be 80 percent.  The researcher wishes to have an error of less than 5 percent and to be 95 percent confident of an estimate to be made from a mail survey.  What sample size is required? (show your full calculations) formula: n = Z*2pq / E^2          Z = 1.96            E = 0.05            p = 0.8            q = 0.20

Principles Of Marketing
17th Edition
ISBN:9780134492513
Author:Kotler, Philip, Armstrong, Gary (gary M.)
Publisher:Kotler, Philip, Armstrong, Gary (gary M.)
Chapter1: Marketing: Creating Customer Value And Engagement
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A researcher expects the population proportion of Cubs fans in Chicago to be 80 percent.  The researcher wishes to have an error of less than 5 percent and to be 95 percent confident of an estimate to be made from a mail survey.  What sample size is required? (show your full calculations)

formula: n = Z*2pq / E^2

         Z = 1.96

 

         E = 0.05

 

         p = 0.8

 

         q = 0.20

        

 

 

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