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【简答题】
设X1，X2，…，Xn是独立同分布的随机变量序列，且EX1=μ，DX1=σ2均存在，令，则对任意ε＞0,一( )；=( ) 设X 1 ，X 2 ，…，X n 是独立同分布的随机变量序列，且EX n =μ，DX n =σ 2 均存在，n=1,2，则
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