抽样调查方案 meaning in Chinese

scheme of sample survey

2 . we establish the trial sample survey strategy for whole industry waterway transport statistics , based on the port and waterway superintendence units
( 2 )制定依托港航监督所站进行全行业水路运输量统计的具体试点抽样调查方案。
Before conducting regular sampling surveys , it is necessary to find out about the basic statistics units and their geographical distribution and to establish a scientific sampling framework in accordance with an approved plan for sampling surveys
进行经常性抽样调查，应当在调查前查明基本统计单位及其分布情况，按照经批准的抽样调查方案，建立科学的抽样框。