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B. 6456
C. 9220
D. 97
FUO.Sh
sh the exam.
If you want to be 95% confident of estimating the population proportion
to within a sampling error of +0.01 and there is historical evidence that
the population proportion is approximately 0.40, what sample size is
needed?
Let Z0.025 1.96 and Z0.05 1.64.
