将某工厂的工人按年龄分成两组:“35�岁及以上”、“35�岁以下”,从每组中随机抽取80人,将他们的绩效分数分成5组: , 分别加以统计,得到 Template


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tomski将某工厂的工人按年龄分成两组:“35�岁及以上”、“35�岁以下”,从每组中随机抽取80人,将他们的绩效分数分成5组: , 分别加以统计,得到 coloring