Here is the link.
standard deviation 应该翻译成标准离差还是标准方差,标准方差在我学过的高数概率统计里有,但是我看Becker CPA的教材里觉得deviation好像是离差,因为离差表现了波峰和波幅的离散程度。--引用百度在统计描述中,方差用来计算每一个变量(观察值)与总体均数之间的差异。“方差”(variance)这一词语率先由罗纳德·费雪(Ronald Fisher)在其论文《The Correlation Between Relatives on the Supposition of Mendelian Inheritance》 [1] 中提出。离差(deviation)有两个义项,可以指一个观测值或测验分数与特定的参照点(如平均数、中数等)之间的差距,亦称“离均差”[离差(dispersion)是随机变数的值(即一组数据)关于某个中心值(通常取为数学期望*)偏离或散布的离散程度的一种标志。
From January 2015, she started to practice leetcode questions; she trains herself to stay focus, develops "muscle" memory when she practices those questions one by one. 2015年初, Julia开始参与做Leetcode, 开通自己第一个博客. 刷Leet code的题目, 她看了很多的代码, 每个人那学一点, 也开通Github, 发表自己的代码, 尝试写自己的一些体会. She learns from her favorite sports – tennis, 10,000 serves practice builds up good memory for a great serve. Just keep going. Hard work beats talent when talent fails to work hard.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment