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薛真 · 2020年02月07日

问一道题:NO.PZ2020010302000006

问题如下:

How are quantile functions related to the CDF? When X is a continuous random variable, when does this relationship not hold?

选项:

解释:

The quantile function is the inverse of the CDF function.

That is, if u=FX(x)u = F_X(x) returns the CDF value of X, then q=FX1(u)q = F_X^{-1}(u) is the quantile function.

The CDF function is not invertible if there are regions where there is no probability. This corresponds to a jump in the CDF, as shown in the figures that follow.

解析中as shown in the figures that follow,无图啊.

1 个答案

orange品职答疑助手 · 2020年02月07日

同学你好,它的图片是这张。谢谢同学的提醒~