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182103741351066788129131011学生编号年龄3112321233113415356361137183883914408学生编号年龄219221623132413251326182713281329163014学生编号年龄1113121113121412151416141714181319142017学生编号年龄411642943944174513家长编号年龄110213314415566147118139141012家长编号年龄3115321733133417351136183713381839144015家长编号年龄211922152317241425192682718281329203013家长编号年龄1116121413151412151916141716181719152012家长编号年龄41134218431044124515
