
英语的mean这个词有哪些用法? - 知乎
mean这个词有许多用法和含义,在不同的情境下有不同的解释和表达方式。 以下是一些常见的用法: 1. 表示某物或某人的意图、目的或动机。 例如: - What do you mean? 你是什么意思? - I mean to …
均值 (mean)和平均值 (average)的区别? - 知乎
均值 (mean)是对恒定的真实值进行测量后,把测量偏离于真实值的所有值进行平均所得的结果; 平均值 (average)直接对一系列具有内部差异的数值进行的测量值进行的平均结果。均值是“ 观测值 的平 …
话说数据科学——数学技能之均值(mean)与方差(variance)
01 均值(mean) 在这个等式的左侧使用符号来表示均值,其右下侧的x表示一个集合,故所表达的是集合x中所有数之和的均值。通过等式右侧的表达式可知,在集合x中有n个数,集合x的所有数之和表示 …
Which "mean" to use and when? - Cross Validated
So we have arithmetic mean (AM), geometric mean (GM) and harmonic mean (HM). Their mathematical formulation is also well known along with their associated stereotypical examples (e.g., Harmonic mea...
如何成为所谓的“mean girl”? - 知乎
如何成为所谓的“mean girl”? 如题。 基本上每个人身边都会有那么一个女生,长相中上,高矮不计但身材苗条,会打扮自己,穿衣有型,有一两个可谓不离不弃的“跟班”朋友,男生喜欢,众人焦点。 … 显 …
如何正确使用 mean 这个单词?可否举例说明? - 知乎
Aug 7, 2012 · 词典里翻译成的“小气,吝啬”只是mean的一小部分意思。 Mean在口语中更多的是“毒舌,刻薄,过分,坏”的意思。 -Cady: You're the one who made me like this so you could use me for …
Difference in Means vs. Mean Difference - Cross Validated
Apr 29, 2015 · When studying two independent samples means, we are told we are looking at the "difference of two means". This means we take the mean from population 1 ($\\bar y_1$) and …
z-score 标准化 (zero-mean normalization) - 知乎
最常见的标准化方法就是 Z标准化,也是 SPSS 中最为常用的标准化方法,spss默认的标准化方法就是z-score标准化。 也叫 标准差 标准化,这种方法给予原始数据的均值(mean)和标准差(standard …
What is the difference between Mean Squared Deviation and Variance?
Oct 10, 2016 · I also guess that some people prefer using mean squared deviation as a name for variance because it is more descriptive -- you instantly know from the name what someone is talking …
What is the difference between "mean value" and "average"?
The mean you described (the arithmetic mean) is what people typically mean when they say mean and, yes, that is the same as average. The only ambiguity that can occur is when someone is using a …