统计量在统计推断中的关键作用分析

The Key Role Analysis of Statistics in Inference Statistic

常用统计量及其分布,在实现用样本推断总体这个统计推断的主体思想中起着关键的作用,选取合适的统计量,再通过运算或逻辑推理来完成参数估计和假设检验是统计推断的主要步骤.正态分布、χ~2分布、t分布和F分布是四个常用统计量的分布,通过归纳分析,揭示了在统计推断中灵活选择运用这些统计量的规律.

Common statistics and their distribution play a key role in juche idea of statistical inference that sample infer population.The main steps of statistical inference are selecting the appropriate statistics and through arithmetic or logical reasoning to complete the parameter estimation and hypothesis testing. Normal distribution, χ^2 distribution, t distribution and F distribution are four common statistics distribution, through the inductive analysis,the article reveals the rules of flexible selection of these statistics in statistical inference.