A stratified random sample of size 120 is to be drawn from the population. The sizes of the samples from the three strata under Neyman’s optimum allocation scheme are respectively:
A. 30, 45, 45
B. 20, 40, 60
C. 20, 50, 50
D. 20, 45, 55
Answer:B
A stratified random sample of size 120 is to be drawn from the population. The sizes of the samples from the three strata under Neyman’s optimum allocation scheme are respectively:
A. 30, 45, 45 B. 20, 40, 60 C. 20, 50, 50 D. 20, 45, 55