(45)
Answer (Choose 1 answer)
A researcher did a pilot sample of 81 individuals and found sample proportion to be 0.20. How many MORE must he survey to develop a 95% confidence interval that has a 0.03 margin of error?Let z_0.025-1.96; z_0.05-1.645.
A. None of the others
B. 658
C. 602
D. 639
E. 683
