E(X)=SIGMA(T*P(T))FROM 0 TO infinite.

jinjing · 2012-12-22 05:16:17Z

E(X)=SIGMA(T*P(T))FROM 0 TO infinite.简介

来源: jinjing 于 2012-12-22 05:16:17 [档案] [旧帖] [给我悄悄话] 本文已被阅读： 0 次 (280 bytes)

The unite the smaller the better.

Exp: 1 Million people.

i years old people died that year is x : P(i)=x/1m.

i from 0 to 120.

Sorry ,I'm not at home and can't tell you the detail.

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