对于新变量 z 来说，如果在 n 次试验之下它的取值变化不大，即是说M

对于新变量 z 来说，如果在 n 次试验之下它的取值变化不大，即是说
M2较小，则这个新变量可以去掉。反之，较大，那么这个新变量有较大的变化，它的作用比较明显。注意到Z的取值与c的选取有关。

結果 (英文) 1:

For the new variable z, if in n trials under its value changes little, that is to sayM2 is small, then this new variable can be removed. Conversely, the larger, the new variable has a large change, its effect is more noticeable. Notes the value of z and c related to the selection.

結果 (英文) 2:

For new variable z, if not its value changes under the n trials, meaning that
M2 is small, then the new variable can be removed. Conversely, the larger, then the new variables have a greater change, and its role is obvious. Noting the value Z c and select about.