Answer (Choose 1 answer)
Let 201 =1.28, 20.05 =1.64,20.025 1.96
A A researcher at a major hospital wishes to estimate the proportion of the adult population of the United States that has high blood pressure. How large a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 4%?
A. 747
B. 420
C. 601
D. 105
E. None of the other choices is correct
Rsh
Q: 47
