DESIGN: a simple random sampling survey.

设计：简单随机抽样调查。

youdao

I have come across various survey reports on the well-being (or satisfaction) level of residents, but most are based on a simple random sampling on streets.

过去也经常听说各种居民生活幸福水平(或满意度)调查报告，但多是街头随机抽样的调查问卷。

youdao

I have come across various survey reports on the well-being (or satisfaction) level of residents, but most are based on a simple random sampling on streets.

过去也经常听说各种居民生活幸福水平(或满意度)调查报告，但多是街头随机抽样的调查问卷。

youdao