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arXiv 1909.07686stat.ME
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具有函数型响应的函数线性模型的拟合优度检验

A goodness-of-fit test for the functional linear model with functional response

Eduardo García-Portugués, Javier Álvarez-Liébana, Gonzalo Álvarez-Pérez, Wenceslao González-Manteiga

AI总结:

针对函数型响应函数线性模型,本文提出基于双重投影经验过程 Cramér–von Mises 范数与 wild bootstrap 校准的拟合优度检验,并给出适配的正则化估计量,通过模拟、对比检验和真实数据集验证其应用。

摘要:

具有函数型响应的函数线性模型(Functional Linear Model with Functional Response,FLMFR)是评估两个函数型随机变量之间关系的最基础模型之一。本文提出了一种新颖的 FLMFR 拟合优度检验,用于对抗一般的、未指定的备择假设。检验统计量被表述为双重投影经验过程上的 Cramér–von Mises 范数,并利用几何论证得到一个易于计算的加权二次范数。一个重抽样程序通过对残差进行 wild bootstrap 并使用便捷的计算程序来校准该检验。作为附带贡献,由于该统计量需要 FLMFR 的可靠估计量,我们讨论并比较了若干正则化估计量,并提供了一个对我们的检验特别方便的新估计量。通过模拟研究说明了该检验的有限样本行为。此外,将这一新提议与以往的显著性检验进行了比较。两个新颖的真实数据集说明了该新检验的应用。

英文摘要:

The Functional Linear Model with Functional Response (FLMFR) is one of the most fundamental models to assess the relation between two functional random variables. In this paper, we propose a novel goodness-of-fit test for the FLMFR against a general, unspecified, alternative. The test statistic is formulated in terms of a Cramér-von Mises norm over a doubly-projected empirical process which, using geometrical arguments, yields an easy-to-compute weighted quadratic norm. A resampling procedure calibrates the test through a wild bootstrap on the residuals and the use of convenient computational procedures. As a sideways contribution, and since the statistic requires a reliable estimator of the FLMFR, we discuss and compare several regularized estimators, providing a new one specifically convenient for our test. The finite sample behavior of the test is illustrated via a simulation study. Also, the new proposal is compared with previous significance tests. Two novel real datasets illustrate the application of the new test.

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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