钟形关于 μ 对称;3σ 原则记住 68.27/95.45/99.74。
We consider a dice game that played an important role in the historical development of probability. The famous letter…
一颗骰子扔 4 次,扔出 6 就赢——稳赚。两颗骰子扔 24 次,扔出双六就赢——他以为同理,结果稳赔。