In a ________ , the population is divided into mutually exclusive groups and then random samples are drawn from each group.
a. convenience sample
b. judgment sample
c. snowball sample
d. stratified sample
Answer: d. stratified sample
In a ________ , the population is divided into mutually exclusive groups and then random samples are drawn from each group.
a. convenience sample
b. judgment sample
c. snowball sample
d. stratified sample
Answer: d. stratified sample