1、单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,我们组分别调查了,45,名患有近视的中小学学生和家长，他们开始患近视的年龄如下表。,学生编号,年龄,1,8,2,10,3,7,4,13,5,10,6,6,7,8,8,12,9,13,10,11,学生编号,年龄,31,12,32,12,33,11,34,15,35,6,36,11,37,18,38,8,39,14,40,8,学生编号,年龄,21,9,22,16,23,13,24,13,25,13,26,18,27,13,28,13,29,16,30,14,学生编号,年龄,11,13,12,11,13,12
2、14,12,15,14,16,14,17,14,18,13,19,14,20,17,学生编号,年龄,41,16,42,9,43,9,44,17,45,13,家长编号,年龄,1,10,2,13,3,14,4,15,5,6,6,14,7,11,8,13,9,14,10,12,家长编号,年龄,31,15,32,17,33,13,34,17,35,11,36,18,37,13,38,18,39,14,40,15,家长编号,年龄,21,19,22,15,23,17,24,14,25,19,26,8,27,18,28,13,29,20,30,13,家长编号,年龄,11,16,12,14,13,15,14,12,15,19,16,14,17,16,18,17,19,15,20,12,家长编号,年龄,41,13,42,18,43,10,44,12,45,15,
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