| 单词 | student's t-distribution |
| 释义 | > as lemmasStudent's t-distribution Student's t-distribution n. (also Student's distribution, Student distribution, Student t-distribution) a family of continuous probability distributions, each resembling the normal distribution (see normal adj. 10) and widely used to approximate that distribution in situations where the standard deviation of a population is unknown; a member of this family.For a single sample, the value of the parameter t is taken to be (x̄ − μ)/(s/√n), where x̄ is the sample mean, μ is the population mean, s is the standard deviation of the sample, and n is the sample size. The t-distribution describes how the value of t is distributed according to a certain probability density function.extracted from Studentn.2< as lemmas |
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