以系统随机整群抽样法对陕南白山羊进行了遗传资源的抽样检测。

The genetic resources of South Shaanxi white goats are examined with the method of Stratified Random Cluster sampling.

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方法：于2005-10采用整群抽样法随机抽取河南大学本科新生310人进行问卷调查。

METHODS:310 freshmen in October 2005, selected from Henan University by cluster sampling, were interviewed by questionnaires.

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方法采用随机整群抽样法抽取699名护航舰队官兵，用症状自评量表(SCL - 90)对其进行心理测评。

MethodsThrough random cluster sampling, 699 convoying warship soldiers were investigated with Symptom Check-List 90 (SCL-90).

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