摘要:统计170名新生女婴的体重.得到如下频率分布表分组编号1234567组距(g)[1700.1900)[1900.2100)[2100.2300)[2300.2500)[2500.2700)[2700.2900)[2900.3100)组频数1135132228分组编号8910111213 组距(g)[3100.3300)[3300.3500)[3500.3700)[3700.3900)[3900.4100)[4100.4300) 组频数392820721

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