孙杨正在为备战第15届游泳世锦赛而刻苦训练．为判断他的成绩是否稳定，教练要对他10次训练的成绩进行统计分析，则教练需了解10次成绩的_刷题宝

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孙杨正在为备战第15届游泳世锦赛而刻苦训练．为判断他的成绩是否稳定，教练要对他10次训练的成绩进行统计分析，则教练需了解10次成绩的（　）

A：众数

B：方差

C：平均数

D：频数

上一题下一题 0.0难度选择题更新时间:2015-02-08 04:36:28

答案(点此获取答案解析）

B

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