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NO.PZ2017092702000117 问题如下 Whisampling biis most likely investigatewith out-of-sample test? A.Look-ahebi B.ta-mining bi C.Sample selection bi B is correct.out-of-sample test is useto investigate the presenof ta-mining bias. Sua test uses a sample thes not overlthe time perioof the sample on whia variable, strategy, or mol wvelope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。 请教老师,out of sample test在讲义那个部分有呢?谢谢
B 和 C请老师给区分一下?
为什么被过度挖掘的数据可以使用原先样本以外的数据做检验呢?
什么叫out of sampletest呢?
为什么不选C呢?没有看懂,谢谢