题目
Which one of the following statements is true about non-probability sampling?
选项
A.There is significant risk that the sample is not representative of the population.
B.Every member of the population has an equal chance of being selected for the sample.
C.Using judgment guarantees that population subdivisions of interest are represented in the sample.
答案
A
解析
A is correct. Because non-probability sampling is dependent on factors other than probability considerations, such as a sampler’s judgment or the convenience to access data, there is a significant risk that non-probability sampling might generate a non-representative sampleA是正确的。由于非概率抽样取决于除概率因素以外的其他因素，如采样器的判断或访问数据的便利性，因此存在非概率抽样可能产生非代表性样本的重大风险