请问这道题B选项如何解释

问题如下：

Which of the following descriptions of the sample partial autocorrelations is the most correct? A sample partial autocorrelation: 

选项：

A.

is the same as sample autocorrelation.

B.

differs from sample autocorrelation in the size of the dataset where it applies.

C.

uses only non-linear regressions.

D.

always falls within a one-standard-error band.

解释：

B is correct.

考点：Autocorrelation

解析：在不同规模的数据集中，样本偏自相关会不一样。

本题在学有余力的情况下，当成补充结论记忆一下，有个印象就好。