arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.04889stat.ME
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广义函数标量线性模型的模型检验

Model Testing for Generalized Scalar-on-Function Linear Models

Stephanie T. Chen, Luo Xiao, Ana-Maria Staicu

摘要:

标量-函数线性模型通常用于对标量响应的函数预测因子进行回归。然而,函数模型比传统的线性模型更难以估计和解释,并且对于数据应用来说可能是不必要的复杂。假设检验可用于通过确定功能预测器是否必要来指导模型选择。使用惩罚样条和方差分量检验的混合效应表示,我们提出了一个测试函数线性模型与指数族分布的响应的框架。该方法可以适应密集和稀疏的功能数据,并用于测试功能预测的无效果和效果的形式。我们通过仿真研究表明,所提出的方法达到了标称水平,具有高功率,我们证明了其实用性与两个数据应用。

英文摘要:

Scalar-on-function linear models are commonly used to regress functional predictors on a scalar response. However, functional models are more difficult to estimate and interpret than traditional linear models, and may be unnecessarily complex for a data application. Hypothesis testing can be used to guide model selection by determining if a functional predictor is necessary. Using a mixed effects representation with penalized splines and variance component tests, we propose a framework for testing functional linear models with responses from exponential family distributions. The proposed method can accommodate dense and sparse functional data, and be used to test functional predictors for no effect and form of the effect. We show via simulation study that the proposed method achieves the nominal level and has high power, and we demonstrate its utility with two data applications.

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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