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1 . 一种袋装食品用生产线自动装填,每袋质量大约为50g,但由于某些原因,每袋食品不会恰好是50g.现随机抽取100袋食品,测得的质量数据如下:

单位:g

57          46          49          54          55          58          49          61          51          49
51          60          52          54          51          55          60          56          47          47
53          51          48          53          50          52          40          45          57          53
52          51          46          48          47          53          47          53          44          47
50          52          53          47          45          48          54          52          48          46
49          52          59          53          50          43          53          46          57          49
49          44          57          52          42          49          43          47          46          48
51          59          45          45          46          52          55          47          49          50
54          47          48          44          57          47          53          58          52          48
55          53          57          49          56          56          57          53          41          48
(1)为了获得样本数据的分布情况,试制作频率分布表;
(2)绘制频率分布直方图及频率分布折线图.
2023-10-05更新 | 106次组卷 | 3卷引用:第5章 统计与概率-【优化数学】单元测试能力卷(人教B版2019)
共计 平均难度:一般