random sampling指的是下面哪一项：（）
举一反三
- cluster sampling指的是下面哪一项：（）
- Which of the following is not random sampling method ? () A: Simple random sampling B: Systematic<br/>sampling C: Nonprobability sampling D: Cluster sampling E: Stratified sampling
- Which of the following is an example of nonprobabilistic sampling? A: Simple random sampling B: Stratified simple random sampling C: Cluster sampling D: Judgment sampling
- The following sampling method with the smallest sampling error is () A: Stratified sampling B: Simple random sampling C: Systematic sampling D: Cluster sampling E: Double-blind sampling
- random sampling的中文翻译是：（）