男生:4.8,4.6,5.0,5.1,4.4,5.2,4.9,4.9,4.8,5.0,4.5,4.9,4.7,4.9,5.2,4.8
女生:4.9,5.1,5.2,4.9,5.2,4.7,5.0,4.9,4.7,5.1,5.0,5.1,5.1,5.0,4.9,5.2
(1)把上面的数据整理在下表中。
三(2)班同学视力检查情况统计表
(2)正常视力的标准是5.0,结合上面的数据,你对三(2)班的同学有什么建议吗?
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