The distribution function of a random cariable X is given by
F(X)= 0 if X< -3
3/8 if -3≤X<0
1/2 if 0≤X<3
3/4 if 3≤X<4
1 if X≥4
Calculate E(X), E( X2 -2│X│) and E( X│X│) ?
The solution are E(X) =5/8 E( X2 -2│X│) =31/8 E( X│X│)=23/8
請問一下這些步驟要怎麼做? 我算來算去答案都不符合正確答案呢 >.<