並前往https://chih-sheng-huang821.medium.com/%E7%9B%B8%E9%97%9C%E4%BF%82%E6%95%B8%E8%88%87%E5%85%B1%E8%AE%8A%E7%95%B0%E6%95%B8-correlation-coefficient-and-covariance-c9324c5cf679
