Market involves aggregating prospective buyers into groups that have common needs and will respond similarly to a marketing action.

每次随机留出一个样本作为检验集,余下的作为训练集是那种抽样方法______。 A: n倍交叉验证 B: Bagging(Bootstrap aggregating) C: 无放回随机抽样 D: 留一法交叉验证