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Full-Text Articles in Physical Sciences and Mathematics
R Codes For "Multilevel Sparse Functional Principal Component Analysis" (Stat), Chongzhi Di
R Codes For "Multilevel Sparse Functional Principal Component Analysis" (Stat), Chongzhi Di
Chongzhi Di
No abstract provided.
Change Point Testing In Logistic Regression Models With Interaction Term, Y Fong, Cz Di, S Permar
Change Point Testing In Logistic Regression Models With Interaction Term, Y Fong, Cz Di, S Permar
Chongzhi Di
The threshold effect takes place in situations where the relationship between an outcome variable and a predictor variable changes as the predictor value crosses a certain threshold/change point. Threshold effects are often plausible in a complex biological system, especially in defining immune responses that are protective against infections such as HIV-1, which motivates the current work. We study two hypothesis testing problems in change point models. We first compare three different approaches to obtaining a p-value for the maximum of scores test in a logistic regression model with change point variable as a main effect. Next, we study the testing …