在某地举办的青年教师说课大赛中,某位老师得分被评委所打出的分数如下:
8.8 9.0 8.9 9.0 9.5 9.3 9.4 9.3 8.7
则这位老师的平均分和方差分别为( )
A.9.2,0.07 | B.9.2 ,0.08 |
C.9.1,0.08 | D.9.1,0.07 |
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在某地举办的青年教师说课大赛中,某位老师得分被评委所打出的分数如下:
8.8 9.0 8.9 9.0 9.5 9.3 9.4 9.3 8.7
则这位老师的平均分和方差分别为( )
A.9.2,0.07 | B.9.2 ,0.08 |
C.9.1,0.08 | D.9.1,0.07 |
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