抽样的方式可以分为概率抽样和非概率抽样两种，概率抽样（Probability Sampling）是随机的抽样，按一定的概率以随机原则抽取样本，每个单位被抽中的概率是已知的，或是可以计算出来的。
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... probability distribution概率分布 probability sampling概率抽样法 probable event可能发生事项 ...
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non-probability sampling [数] 非概率抽样 ; 非随机抽样 ; 非机率抽样法
non-equal probability sampling 不等概采样
Area Probability Sampling 区域机率抽样
equal probability sampling 等概率抽样
stratified probability sampling 分层概率抽样
alternative to probability sampling [统计] 概率抽样的备择方案
It may determine whether one should choose nonprobability sampling or probability sampling.
它可以决定一个人应该选择非概率抽样还是概率抽样。
The result showed that the root-mean-square of Phase function fitted by random probability sampling method is smaller.
结果显示随机概率抽样方法拟合的相函数与散射相函数间的方均根差更小。
Methods According to the distribution of recreation places of Shunqing district, 368 CSW were investigated one-to-one by anonymous questionnaire through equal probability sampling.
方法 按顺庆城 区娱乐场所分布用等概率随机抽样方法抽中368名暗娼 按“一对一”问卷调查。
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