问题：
[单选题]若甲单位的平均数比乙单位的平均数小，但甲单位的标准差比乙单位的标准差大，则（ ）。
A、甲单位的平均数代表性比较大
B、甲单位的平均数代表性比较小
C、两单位的平均数代表性一样大
D、无法判断
C、两单位的平均数代表性一样大
D、无法判断
参考答案：
B
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