【简答题】若X是连续型随机变量,其概率密度函数为 ,则X的分布函数为F(a)=P(X
【单选题】若F(x)是连续型随机变量X的分布函数,则下面结论错误的是( )
【简答题】If A=-144,B=abs(A),then sqrt(B)=(_);
【单选题】I tried to get out of the business ______ I found impossible to carry on.
【判断题】若F(x)是连续变量X的分布函数,则0≤F(x)≤1.
【简答题】I tried to get out of the business ________ I found impossible to carry on. A) why B) which C) what D) where
【单选题】Although I tried to concentrate on the lecture, I was distracted by the noise made by the rushing-in girls.