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2014-01-03Buch DOI: 10.18452/4489
A Simultaneous Confidence Corridor for Varying Coefficient Regression with Sparse Functional Data
Gu, Lijie
Wang, Li
Härdle, Wolfgang Karl cc
Yang, Lijian
We consider a varying coefficient regression model for sparse functional data, with time varying response variable depending linearly on some time independent covariates with coefficients as functions of time dependent covariates. Based on spline smoothing, we propose data driven simultaneous confidence corridors for the coefficient functions with asymptotically correct confidence level. Such confidence corridors are useful benchmarks for statistical inference on the global shapes of coefficient functions under any hypotheses. Simulation experiments corroborate with the theoretical results. An example in CD4/HIV study is used to illustrate how inference is made with computable p-values on the effects of smoking, preinfection CD4 cell percentage and age on the CD4 cell percentage of HIV infected patients under treatment.
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DOI
10.18452/4489
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https://doi.org/10.18452/4489
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