78 | 86 | 94 | 90 | 93 | 68 | 72 | 64 | 88 | 21 |
89 | 92 | 85 | 88 | 92 | 95 | 89 | 94 | 86 | 87 |
91 | 60 | 95 | 87 | 99 | 95 | 89 | 90 | 85 | 86 |
94 | 100 | 53 | 83 | 90 | 84 | 93 | 84 | 82 | 60 |
(1)根据上面的数据,完成下面的统计表。
分数段/分 | 60以下 | 60~69 | 70~79 | 80~89 | 90~100 |
人数 |
(2)哪个分数段人数最多?哪个分数段人数最少?
(3)如果85分(含85分)以上为优秀,那么六(5)班这次英语测验的优秀率是多少?
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