名词短语
中文翻译：不成比例的分层抽样
同义词：
['disproportionate sampling', 'unequally sampled', 'biased sampling']
例句：
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1. The study used disproportionate stratified sampling to identify the most prevalent diseases in the region.
该研究采用了不成比例的分层抽样方法，以识别该地区最常见的疾病。
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2. The researchers found that the data was biased due to the disproportionate stratified sampling method used.
研究人员发现，由于使用了不成比例的分层抽样方法，数据存在偏差。
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3. The decision to use disproportionate stratified sampling was made based on the need for a representative sample.
决定使用不成比例的分层抽样是基于需要代表性样本的需求。