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- 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 say that it's not fair 我的意思是说这不公平。 - What does it mean when he says that?
- 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 的平均”，平均值是“ 统计量 的平均”。举个例子，例如一个人的身高的真实值是180，但利用不同的仪器
- 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
- Why is Standard Deviation preferred over Absolute Deviations from the Mean?
The mean is the number that minimizes the sum of squared deviations Absolute mean deviation achieves point (1), and absolute median deviation achieves both points (1) and (3)
- mean - Averaging variances - Cross Validated
Context is everything here Are these theoretical variances (moments of distributions), or sample variances? If they are sample variances, what is the relation between the samples? Do they come from the same population? If yes, do you have available the size of each sample? If the samples do not come from the same population, how do you justify averaging over the variances?
- 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的所有数之和表示为 ，即 的计算结果，因此其均值为所有数的总和除以数字的个数n。 我们举一个简单的例子来看一下
- What is implied by standard deviation being much larger than the mean?
What does it imply for standard deviation being more than twice the mean? Our data is timing data from event durations and so strictly positive (Sometimes very small negatives show up due to clock
- 均值 (mean)和平均值 (average)的区别？ - 知乎
mean和average都是平均数的意思,主要区别在于: 1 用法上,mean通常指算术平均数或统计中的均值,average则更广泛地指代平均数。 2 mean一般适用于数学和统计学领域,average可以应用于日常用语。 3 在数学运算上,mean需要将一组数据求和后再除以数据个数来计算。
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