(24)
(Choose 1 answer)
(See picture)
A. 139
B. 97
C. 12
D. 10
If you want to be 95% confident of estimating the population mean to within a sampling error of +2 and the standard deviation is assumed to be 12, what sample size is required?
Let Z0.025 1.96 and 20.05-1.64.
