| 释义 |
t distribution
t distribution n (Statistics) See Student's t t distribution
t distribution[′tē ‚dis·trə‚byü·shən] (statistics) A distribution used to test a hypothesis about a population mean when the population standard deviation is not known, the sample size is small, and the normal distribution is assumed for the sample mean. t distribution
t dis·tri·bu·tionthe distribution of the quotient of independent random variables, the numerator of which is a standardized normal variate and the denominator the positive square root of the quotient of a chi-square (χ2) distributed variate and its number of degrees of freedom. |