用英文给random sample下定义.完整的 权威的准确的定义 要是英文的.
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用英文给random sample下定义.完整的 权威的准确的定义 要是英文的.
用英文给random sample下定义.
完整的 权威的准确的定义 要是英文的.
用英文给random sample下定义.完整的 权威的准确的定义 要是英文的.
A random sample is one chosen by a method involving an unpredictable component.Random sampling can also refer to taking a number of independent observations from the same probability distribution,without involving any real population.
random sample: a sample in which every element in the population has an equal chance of being selected
形容词 random:
lacking any definite plan or order or purpose; governed by or depending on chance
taken haphazardly
名词 sample:
a small part of something intended as representative of the...
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形容词 random:
lacking any definite plan or order or purpose; governed by or depending on chance
taken haphazardly
名词 sample:
a small part of something intended as representative of the whole
items selected at random from a population and used to test hypotheses about the population
同义词：sample distribution, sampling
all or part of a natural object that is collected and preserved as an example of its class
动词 sample:
take a sample of
同义词：try, try out, taste
字典上的
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A sample is a subject chosen from a population for investigation. A random sample is one chosen by a method involving an unpredictable component. Random sampling can also refer to taking a number of independent observations from the same probability distribution, without involving any real population.来自维基百科