故事背景

问题

方法

python代码

import numpy as np
from scipy.stats import chi2_contingency

# 观察频数矩阵
observed = np.array([[47, 21, 17],
                     [63, 29, 15],
                     [11, 2, 4]])

# 进行卡方检验
chi2, p, dof, expected = chi2_contingency(observed)

# 输出结果
print("输出结果：\n")
print(f"卡方统计量: {chi2}")
print(f"计算出的p值: {p}")
print(f"自由度: {dof}")
print("期望频数矩阵:")
print(expected)

运行结果