組別 |
平均分 |
中位數(shù) |
眾數(shù) |
方差 |
合格率 |
優(yōu)秀率 |
甲 |
6.8 |
6 |
3.96 |
90% |
20% |
|
乙 |
7.5 |
2.76 |
80% |
10% |
(參考數(shù)據(jù):sin27°=0.45,cos27°=0.89,tan27°=0.51)