若随机变量X的方差存在,由切比雪夫不等式可得P{∣X-E(X)∣﹥1)≤()
D(X)
1/D(X)
εD(X)
1/εD(X)
若随机变量X的方差存在,由切比雪夫不等式可得P{∣X-E(X)∣﹥1)≤D(X)