Question

广大万能神奇善良的网友们，赶快帮我解释下Parametric tests 和Nonparametric tests到底是什么鬼呢？

Answer 1

Parametric methods deal with the estimation of population parameters (like the mean)
while the non-parametric are distribution free methods. They rely on ordering (ranking) of observations.
从字面意思应该是，Parametric 是依赖均值，就是比的时候不是一对一对的比是一群数字一起比。non-parametric 应该就是一对一对的比
More specifically, the data distribution is
significant in the choice between parametric and non-parametric
procedures.If we believe that the populations are normally distributed
then we use parametric methods. If we are not sure or we suspect that
they do not behave normally then we use non-parametric methods.
如果你对个体是普通的你就用Parametric 如果你个体都是特殊的你就用non-parametric

Answer 2

Parametric tests是指用样本或总体中测算出的系数进行test,这里mean(均值)或variance（方差）都叫parameter, 所以叫parametric test;
Nonparametric test就是不用样本或总体测算的系数进行对比,比如用给样本或总体排序的方法去进行tests

Answer 3

Parametric tests 参数检验; 参数测试;
Nonparametric tests非参数检验; 无母数检定;
用金山词霸 一查就知道了。