In selecting the placement of knot points in implementing cubic splines,it is common to
A)Space the knot points equally.
B)Use more knot points where data is sparse and fewer where data is plentiful.
C)Use fewer knot points where data is sparse and more where data is plentiful.
D)Allocate the knot points randomly across the spectrum to minimize estimation bias.

Question

Quizplus · Accepted Answer

Cubic splines often use more knot points in regions where data is plentiful to capture the complex patterns in those areas, and fewer where data is sparse, as there is less information to model. This approach helps in fitting the model more accurately to the underlying data structure.

In Selecting the Placement of Knot Points in Implementing Cubic