Kizspy | Question: 56
(Choose 1 answer)
(See picture)
A. 16
B. 4
C. 11
D. 5
If you want to be 95% confident of estimating the population mean to within a sampling error of +10 and the standard deviation is assumed to be 20, what sample size is required?
Let Z0.025 1.96 and 20.05-1.64.
