摘要： 解 观察直方图.可得 车速为50千米/时的有2辆.车速为51千米/时的有5辆. 车速为52千米/时的有8辆.车速为53千米/时的有6辆. 车速为54千米/时的有4辆.车速为55千米/时的有2辆. 车辆总数为27. ········································································································ 2分 ∴这些车辆行驶速度的平均数为 ．·············································· 4分 ∵将这27个数据按从小到大的顺序排列.其中第14个数是52. ∴这些车辆行驶速度的中位数是52． ······································································· 6分 ∵在这27个数据中.52出现了8次.出现的次数最多. ∴这些车辆行驶速度的众数是52．················································································ 8分

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