4. Let X be an RV such that \( P(a \le X \le b) = 1 \) where \( -\infty < a < b < \infty \). Show that \( \operatorname{Var}(X) \le \frac{(b-a)^2}{4} \). (10 分)
阿摩線上測驗
登入
阿摩線上測驗
登入
4. Let X be an RV such that \( P(a \le X \le b) = 1 \) where \( -\infty < a < b < \infty \). Show that \( \operatorname{Var}(X) \le \frac{(b-a)^2}{4} \). (10 分)