sample proportion test 单样本比例检验
distribution of sample proportion 样本比例分布
mixed sample proportion 混拌比例
sample estimate of proportion 比例的样本估计值
Produce a sample in proportion 按比例制作一个样品
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At the national level it is easy enough, though expensive, to account for this by surveying CPOs and including them in the sample in proportion to their share of the population.
ECONOMIST: Political polls
To do this, he and his team took a random sample from the corpus, checked what proportion were non-words and extrapolated that to the whole lot.
ECONOMIST: Science invades the humanities
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