Nonparametric Spline Truncated Regression with Knot Point Selection Method Generalized Cross Validation and Unbiased Risk

Nonparametric regression approaches are used when the shape of curve between response variable and predictor is assumed to be unknown. excess has high flexibility. A frequently nonparametric approach a truncated spline that excellent ability handle data whose behavior at certain sub-intervals. The aim this study was obtain best model multivariable with linear quadratic using Generalized Cross Validation (GCV) Unbiased Risk (UBR) methods find out factors influencing stunting prevalence in Indonesia 2021. as by percentage infants receiving Exclusive breastfeeding for 6 months, households proper sanitation, toddlers Early Childhood Cultivation (IMD), poor population, pregnant womenIt's risk. Results show modeling GCV method three knot points. This minimum value 7.29 MSE 1.82. Factors incidence 2021 include people, women risk KEK.