Multiple choices 46/50
(Choose 1 answer)
(See picture)
A. 259
B. 20
C. 369
D. 17
If 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 proportion is approximately 0.60, what sample size is needed?
Let Z0.025 1.96 and 20.05-1.64.
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