第二步——用模型进行分类 分类规则 测试集 未知数据 (Jeff, Professor, 4) NAME RANK YEARS TENURED Tom Assistant Prof no Tenured? Merlisa Associate Prof George Professor 2757 no es Joseph Assistant Prof yes第二步——用模型进行分类 分类规则 测试集 N AM E RANK YEA RS TEN U RED Tom Assistant Prof 2 n o Merlisa Associate Prof 7 n o George Professor 5 yes Joseph Assistant Prof 7 yes 未知数据 (Jeff, Professor, 4) Tenured?