A polling organization first randomly selects 50 of the 3,143 U.S. counties, then in each chosen county randomly selects 4 census tracts, then in each tract randomly selects 20 households.
This is best described as a
- Acheck_circle
Multistage cluster sample
- B
Stratified random sample
- C
Simple random sample
- D
Systematic sample
Explanation
Selection occurs in successive random stages of clusters (counties, tracts, households). This is a multistage cluster sample.