请教老师，out of sample test在讲义那个部分有呢？谢谢

问题如下：

Which sampling bias is most likely investigated with an out-of-sample test?

选项：

A.

Look-ahead bias

B.

Data-mining bias

C.

Sample selection bias

解释：

B is correct.

An out-of-sample test is used to investigate the presence of data-mining bias. Such a test uses a sample that does not overlap the time period of the sample on which a variable, strategy, or model was developed.

样本外测试用于调查数据挖掘偏差的存在。 此类测试使用的样本与开发变量、策略或模型的样本时间段不重叠。