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目录抽样
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目录抽样
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抽样调查
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list sampling
目录抽样
一种不等概率、不等比例的抽样调查方法,对达到一定规模以上的单元进行全面调查,对规模以下的单元按一定比例抽取一部分样本进行观察和推断。
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security strategy
security system of wage payment
Security Technical Protection Standards System
security technology
security technology prevention
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security trading market
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security vulnerability scanning technology
SED
Sedan Crater
sedative
sedative-hypnotic
sedative-hypnotic drug
SEDDS
sedecuplet
sedenion
sedenion algebra
sedentary animal
sedentary species
sedge
sedge family
sediment
sediment acoustics characteristics
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