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3.3 数据分组
数据分组就是根据研究的需要,将数据按照某种标准重新划分为不同的组别。在数据分组的基础上进行的频数分析更能够概括和体现数据的分布特征。
3.3.1 单变量数据分组![这种分组适用于数据较少的情况,如果数据较多意义就不是很显著。](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/note.png?sign=1738920504-qeEcDOMFNrrOBKPTUcxPbmZNQqI3JeR1-0-540b8ee8c32bb16605c6a53776c80a8d)
【例3-3】 请将下列人员按照工资的数额分组(工资数额相同的为一组),凡是工资不同的单独为一组。
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0057_0001.jpg?sign=1738920504-ZCwMWLNDfoOo8icKE43Zq4MV31Md0sK4-0-9c90c5e4dfd33317701f787d39aaa572)
操作步骤:
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0057_0002.jpg?sign=1738920504-EpXKJR5aaQAHUVRMs2GRTubQ7vOxhVLy-0-83071b95a8b63af3f65daff49be77288)
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0058_0001.jpg?sign=1738920504-TfoDKDhJFY2l6R8nu9I6erqe7p7JeK2m-0-3e05984911887c59a9b37124023b678c)
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0059_0001.jpg?sign=1738920504-PvAfpiZ8s3TZHeQC83lruMQndCvuLxMj-0-07746bb745a195a5553ff609ca3d2b6e)
3.3.2 组距分组
【例3-4】 请将下列人员的工资分成四组:500-1000为第一组,1001-1500为第二组,1501-2000为第三组,2001-2500为第四组。
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0060_0001.jpg?sign=1738920504-0Ny2F1tyrP3DEODlikJttWqINfpG1uD5-0-dc29d7a24fb0e01f91e40e11839a287a)
操作步骤:
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0060_0002.jpg?sign=1738920504-TS3p7DL3C5R2hRNS7j1sew38WBKdxTTp-0-823ce5b6407960551f83ffe711aa059e)
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0061_0001.jpg?sign=1738920504-bs8CuVCSRQdGEJRruxmmamY6hI2MqpG3-0-7141c20af96f4d066cf99f8a9e843363)
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0062_0001.jpg?sign=1738920504-2c7tGurLJiZjzQ2aQPfWvBd0MHvyGoTe-0-b0f5ddbc012318ff2383c2d9b58119aa)
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0063_0001.jpg?sign=1738920504-2xjYI7DKYmwhA53Auo914n0aNRU42wQh-0-6ddd4474bfad22f8a40ddb47cf7f0157)
3.3.3 分位数分组
【例3-5】 请将下列人员的工资按照四分位数分成四组。
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0064_0001.jpg?sign=1738920504-pnQruP37mTlovsmF37U3lIjVZYlVj2P3-0-702dc1163fed56946aea8b6b65cd4009)
操作步骤:
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0064_0002.jpg?sign=1738920504-D7cUYzwHGqySzMNungcY8LgEDmbzqpag-0-d81d9f4d9f035b8ec8db9ef9c96d4ebb)
![](https://epubservercos.yuewen.com/33625E/11909771004603506/epubprivate/OEBPS/Images/figure_0065_0001.jpg?sign=1738920504-pvY9G4R3iVvYMW2SKtpTS1FL9GTN3vVa-0-e7241e090b5dd872b72c8ae55d3441e1)