python import statsmodels.api as sm import numpy as np import pandas as pd # 生成一些示例数据 np.random.seed(0) X = np.random.rand(100, 2) y = 2 * X[:, 0] + 3 * X[:, 1] + np.random.randn(100) # 添加常数项以拟合截距 X = sm.add_constant(X) # 拟合线性回归模型 model ...