Mathematics, 15.07.2020 21:01 romet31
At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.05 for the estimation of a population proportion
Answers: 2
, and a confidence level of 
, we have the following confidence interval of proportions.
.
, z is the value of Z that has a pvalue of 
, so 
. 
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