初级抽样单位 PSUS PrimarySamplingUnits ; primary sampling units ; primarysampleunit ; PSUs
初级抽样单位内的方差 variance within primary sample units ; within-psu variances
要确定初级抽样单位 Primary Sample Unit
初级抽样单位间的方差 variance between primary sample units
方法采用初级单位含量分层，整群，随机的抽样方法及线索调查。
Methods: Adoppting the elementary units content to divide layer, whole group. Sample method and clue investigation.
初级医疗单位可能需要迅速的把关于所有转诊病人的信息送给付款者机构。
Primary care providers may need to forward information regarding all referred patients to a payor organization.
这可能预示着生病该单位的任何初级侧的噪声性能可以找到的中的纹波或交流对直流输出噪声形成二次侧它的方式。
This could bode ill for the performance of the unit as any noise on the primary side can find it's way over the the secondary side in the form of ripple or AC noise on the DC outputs.
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