want to be 95% confident of esti you population proportion to within a sampling and there is historical evidence that the pos approximately 0.47, what sample size i

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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you
want to be 95% confident of estimating the
population proportion to within a sampling error of ±0.05
and there is historical evidence that the population is
0.47, what sample size is needed?
approximately
Transcribed Image Text:you want to be 95% confident of estimating the population proportion to within a sampling error of ±0.05 and there is historical evidence that the population is 0.47, what sample size is needed? approximately
Expert Solution
Step 1

Given that 

Margin of error =E =0.05

Population proportion p=0.47

 

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