• 2021-04-14
    中国大学MOOC: 设总体X服从均值为1/2的指数分布, X1, X2, X3, X4为来自X的样本, 则X1, X2, X3, X4的联合概率密度为https://edu-image.nosdn.127.net/F770C0311B58BA43097FEF29D139677C.png?imageView&thumbnail=520x520&quality=100