摘要: If we use sample mean: \(\frac{\sum_i{\left( X_i-\bar{X} \right)}^2}{n}\), then we should use sample variance:\(\frac{\sum_i{\left( X_i-\bar{X} \right 阅读全文
posted @ 2022-03-16 14:37 narip 阅读(47) 评论(0) 推荐(0)