what type of regression is age in how many knots is in smoothing spline age is a categorical variable for a smoothing spline weighted randomization of age which of the following is an integer value of age measured in years? how to pick the correct knot for age age as a predictor variable what is the optimal spline for the smoothing spline? which of the following is an appropriate selection of a smoothing-spline? age of patient in regression which is an optimal choice in a smoothing spline how many knots is a smoothing spline what is the optimal selection of knots ielts vs age smoothing curve is age an integer in regression is age an integer what is the best choice of smoothing spline when selecting k knots in a linear regression, what is the optimal placement of each knot? weighted average age for spline smoothing what is the optimal length of the smoothing spline when retaining age