In Selecting the Placement of Knot Points in Implementing Cubic

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.

Correct Answer:

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