1 | 2 | 3 | 4 | 5 | 6 | |
5 | 6 | 7 | 7 | 9 | 8 |
(2)求关于的线性回归方程;
(3)若该集贸蔬菜市场个体承包摊户有300个,根据题设估计该集贸蔬菜市场个体承包摊户年收入总值.
参考公式:相关系数,对于一组具有线性相关关系的数据,其回归直线的斜率和截距的最小二乘估计分别为,,.
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