題目列表(包括答案和解析)
9.4 8.4 9.4 9.9 9.6 9.4 9.7
去掉一個(gè)最高分和一個(gè)最低分后,所剩數(shù)據(jù)的平均值和方差分別為( )
A.9.4,0.484 B.9.4,0.016
C.9.5,0.04 D.9.5,0.016
9.4 8.4 9.4 9.9 9.6 9.4 9.7
去掉一個(gè)最高分和一個(gè)最低分后,所剩數(shù)據(jù)的平均值和方差分別為( )
A.9.4,0.484 B.9.4,0.016 C.9.5,0.04 D.9.5,0.016
A、9.4,0.484 | B、9.4,0.016 | C、9.5,0.04 | D、9.5,0.016 |
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