设随机变量X的概率密度为f(x)=1/2a,-a1}=1/3,则常数a=
问题描述:
设随机变量X的概率密度为f(x)=1/2a,-a1}=1/3,则常数a=
答
integrate density function f(x) from 1 to a.get (a-1)*(1/2a)=1/3 a=3
设随机变量X的概率密度为f(x)=1/2a,-a1}=1/3,则常数a=
integrate density function f(x) from 1 to a.get (a-1)*(1/2a)=1/3 a=3