设随机变量X有期望E(X)与方差D(X)则对任意正数ε,有()
A.P(|X-E(X)|<ε)=D(X)/ε2 B.P(|X-E(X)|<ε)>D(X)/ε2 C.P(|X-E(X)≥ε)≤1-D(X)/ε2 D.P(|X-E(X)|≥ε)≤D(X)/ε2正确答案D
设随机变量X有期望E(X)与方差D(X)则对任意正数ε,有()
A.P(|X-E(X)|<ε)=D(X)/ε2 B.P(|X-E(X)|<ε)>D(X)/ε2 C.P(|X-E(X)≥ε)≤1-D(X)/ε2 D.P(|X-E(X)|≥ε)≤D(X)/ε2正确答案D