甲班成绩
99 | 93 | 92 | 90 |
71 | 92 | 92 | 92 |
88 | 97 | 94 | 93 |
乙班成绩
89 | 90 | 85 | 87 |
82 | 92 | 84 | 86 |
87 | 89 | 94 | 96 |
(1)根据上面的数据,完成下面的统计表。
分数段/分 | 85以下 | 85-89 | 90-94 | 95-100 |
甲班人数 | ||||
乙班人数 |
(2)哪个班的成绩好一些?请写出你判断的依据。
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2