Stratified Sampling A+D

Question 1

what is the first advantage of stratified sampling?

Answer 1

sample accurately reflects the population structure

Question 2

what is the second advantage of stratified sampling?

Answer 2

guarantees proportional representation of groups within a population

Question 3

what is the first disadvantage of stratified sampling?

Answer 3

population must be clearly classified into distinct strata

Question 4

what is the second disadvantage of stratified sampling?

Answer 4

selection within each stratum suffers from the same disadvantages as simple random sampling