题目内容
数值型变量可以转换为顺序数据或分类数据。
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不同的变量类型，统计方法存在一定的差异。
统计数据是统计变量的具体表现。
A—School ZoneB—Vendors ProhibitedC—Pass on LeftD—Don't Step OnE—Keep Away for SafetyF—Service AreaG—Administrative AreaH—Watch Your HandI—Please Don't Leave Valuables UnattendedJ—Maintenance in ProgressK—Out of ServiceL—Stand on RightM—Break Glass in EmergencyN—Don't TouchO—Keep Clear of the DoorP—Don't Exceed Speed LimitQ—Icy Road______当心夹手 ______请勿登踏
______服务区______勿靠车门
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