Mao, Wenxin; Zhao, Linda H. - In: Journal of the Royal Statistical Society Series B 65 (2003) 4, pp. 901-919
We construct approximate confidence intervals for a nonparametric regression function, using polynomial splines with free-knot locations. The number of knots is determined by generalized cross-validation. The estimates of knot locations and coefficients are obtained through a non-linear least...