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arXiv 1206.4085math.PR
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随机加权和与自正规化和的渐近分布

The Asymptotic Distribution of Randomly Weighted Sums and Self-normalized Sums

Peter Kevei, David M. Mason

摘要:

我们考虑自归一化和$T_{n}=\sum_{i=1}^{n}X_{i}Y_{i}/\sum_{i=1}^{n}Y_{i}$,其中${Y_{i} : i\geq 1}$是非负i.i.d.随机变量,并且${X_{i} : i\geq 1} $是i.i.d.随机变量,独立于${Y_{i} : i \geq 1}$。本文的主要结果是:T_PDMATHABMQ $ with finite expectation, if and only if $ Y_1$的每个连续极限律都是中心Feller类.

英文摘要:

We consider the self-normalized sums $T_{n}=\sum_{i=1}^{n}X_{i}Y_{i}/\sum_{i=1}^{n}Y_{i}$, where ${Y_{i} : i\geq 1}$ are non-negative i.i.d. random variables, and ${X_{i} : i\geq 1} $ are i.i.d. random variables, independent of ${Y_{i} : i \geq 1}$. The main result of the paper is that each subsequential limit law of T_n$ is continuous for any non-degenerate $X_1$ with finite expectation, if and only if $Y_1$ is in the centered Feller class.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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