平均数

平均数（Mean）、均值是统计中的一个重要概念。为集中趋势的最常用测度值，目的是确定一组数据的均衡点。

算术平均数（或简称“平均数”）是一组样本 $x_1, x_2, \ldots, x_n$ 的和除以样本的数量。其通常记作 $\bar{x}$ ：

例如, $4, 36, 45, 50, 75$ 这组数的算术平均数是：

在统计中算术平均数常用于表示统计对象的一般水平，它是描述数据集中程度的一个统计量。我们既可以用它来反映一组数据的一般情况，也可以用它进行不同组数据的比较，以看出组与组之间的差别。用平均数表示一组数据的情况，有直观、简明的特点，所以在日常生活中经常用到，如平均速度、平均身高、平均产量、平均成绩等等。

单词	mean
释义	mean /miːn//miːn/ 英汉-汉英词典 vt. 表示…的意思本意是，原意为；意味怀有某目的；打算对某人有价值或重要打算或注定要某人成为或做某事 adj. 吝啬的；自私的卑鄙的，不善良的中间的，平均的低微的 n. 平均数，平均值中间，中庸时态: meant meaning，means 副词: meanly 词组 \| 习惯用语 in the mean 当其时；同时；在此期间 mean time n. 平均时间（平均太阳时） mean square 均方；均方差；均方值 in the mean time 同时 mean value 平均值，平均数 mean by 意思是… what do you mean 你的意思是什么 mean square error 均方误差；中误差；均方差 mean temperature [医]平均温度 mean business [口]当真 golden mean 中庸之道；[美]黄金分割（等于golden section） root mean square n. 均方根 weighted mean 加权平均数 mean value theorem 中值定理，平均值定律 annual mean 年平均；累年平均 mean velocity 平均速度 mean diameter 平均直径；中径；二次平均直径 mean curvature 平均曲率 mean stress 平均应力 arithmetic mean 算术均数；等差中项英语例句库 When we say yes, we mean it. 我们说同意就同意。 This diagram will illustrate what I mean. 这个图表可说明我的意思。 Gestures are a nonverbal means of expression. 打手势是一种非言语的表达方式。 Are there any means of getting there? 有什么方法可以到那里吗? I have no conception of what you mean. 我想不出你的意思是什么。 I have no conception of what he means. 我完全不懂他的意思。 Don't confound the means with the ends. 不要使手段与目的混淆不清。 I can't fathom what you really meant. 我不能领会你的真正用意。 I haven't the faintest what it means. 我完全不懂这是什么意思。 A silent movie doesn’t mean it is motionless. 无声电影并非没有动作。 You must find a mean between frankness and rudeness. 你要在坦诚与唐突之间取其中。 I swear by God I didn't mean it. 我对上帝发誓我不是这个意思。 That man used artful means to find out secrets. 那人使用狡猾的手段获取机密。 I had no notion of what her words meant. 我不理解她的话是什么意思。 What you do first is to calculate the mean. 你要做的第一件事就是算出平均数。 Darling Peter,you know how much you mean to me. 亲爱的彼得,你知道你对我有多重要。 It has been said that the end justifies the means. 据说目的正确即手段正当。 The invention discloses an output controlling means of audiofrequency apparatus. 本发明公开了音频设备的输出控制方法。 I don't know where the captain means to bunk you. 我不知道船长打算把你的床位安排在那里。 He lives in an opulent apartment but has no visible means of support. 他住在一间豪华公寓里，但看上去没有任何经济来源。声明：以上例句、词性分类均由互联网资源自动生成，未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。原声例句天使不敢涉足的地方 I'm in love with Gino—don't pass it off—I mean it crudely—you know what I mean. 我爱上了吉诺——别假装——我的意思很粗鲁——你明白我的意思。 CNN 听力 2023年2月合集 Do you mean out of a job? 你是说失业? Max带你学发音 That means I have to leave now. 也就是说我现在得走了。 Max带你学发音 This means " have got a" or " have got to" . 意思是“have got a”或“have got to”。明星的人生哲学（双语精选） I think she's taught me so much already about what it means to be a woman. 我觉得她已经教会了我很多关于做一个女人的意义。 VOA慢速英语_科技 That means they orbit in the opposite direction that the planet spins in. 这意味着它们的轨道方向与行星自转的方向相反。 PBS趣味科普 That means the animal isn't doing it in response to stress or something. 这意味着动物不是为了应对压力或其他什么。 VOA常速英语_美洲 I mean to the extent of, you know, making it a major issue of discussion. 我的意识是，这将成为他们讨论的主要话题。 VOA Special 2023年2月合集 To be complacent means to be satisfied with how things are and not wanting to change them. complacent的意思是满足于现状，不想改变现状。华尔街日报 It doesn't give them the means to negotiate for higher pay. 这并没有给他们谈判加薪的手段。中文百科平均数平均数（Mean）、均值是统计中的一个重要概念。为集中趋势的最常用测度值，目的是确定一组数据的均衡点。算术平均数（或简称“平均数”）是一组样本 $x_1, x_2, \ldots, x_n$ 的和除以样本的数量。其通常记作 $\bar{x}$ ：例如, $4, 36, 45, 50, 75$ 这组数的算术平均数是：在统计中算术平均数常用于表示统计对象的一般水平，它是描述数据集中程度的一个统计量。我们既可以用它来反映一组数据的一般情况，也可以用它进行不同组数据的比较，以看出组与组之间的差别。用平均数表示一组数据的情况，有直观、简明的特点，所以在日常生活中经常用到，如平均速度、平均身高、平均产量、平均成绩等等。英语百科 Mean 平均数 In mathematics, mean has several different definitions depending on the context. In probability and statistics, mean and expected value are used synonymously to refer to one measure of the central tendency either of a probability distribution or of the random variable characterized by that distribution. In the case of a discrete probability distribution of a random variable X, the mean is equal to the sum over every possible value weighted by the probability of that value; that is, it is computed by taking the product of each possible value x of X and its probability P(x), and then adding all these products together, giving $\mu = \sum x P(x)$ . An analogous formula applies to the case of a continuous probability distribution. Not every probability distribution has a defined mean; see the Cauchy distribution for an example. Moreover, for some distributions the mean is infinite: for example, when the probability of the value $2^n$ is $\tfrac{1}{2^n}$ for n = 1, 2, 3, .... 近义、反义、联想词近义词 n. average, norm v. convey, impart, necessitate, will, wish, associate, tie in adj. normal, nasty, awful, ignoble, skilled, poor, stingy 反义词 n. abnormal, nice, noble, unskilled, rich, generous, estimable 解析 intend 较正式用词，但常用，指对未来的行动做出打算，并力争实现。 mean 口语多用，指怀有作某事的想法或希望得到某物，特别用于效果不好而动机良好的场合。联想词 imply暗示;think想;does做;know知道;say讲;don先生，阁下;necessarily必要地, 必需地;suppose假设;guess猜测;presume假定;not不; 英英词典 mean n. an average of n numbers computed by adding some function of the numbers and dividing by some function of n synonymous： mean value mean v. mean or intend to express or convey You never understand what I mean! synonymous： intend have as a logical consequence The water shortage means that we have to stop taking long showers synonymous： entail, imply denote or connote `maison' means `house' in French An example sentence would show what this word means synonymous： intend, signify, stand for have in mind as a purpose I mean no harm I only meant to help you synonymous： intend, think have a specified degree of importance My ex-husband means nothing to me Happiness means everything intend to refer to Yes, I meant you when I complained about people who gossip! synonymous： think of, have in mind destine or designate for a certain purpose These flowers were meant for you mean adj. approximating the statistical norm or average or expected value the mean annual rainfall synonymous： average characterized by malice in a mean mood synonymous： hateful having or showing an ignoble lack of honor or morality taking a mean advantage chok'd with ambition of the meaner sort something essentially vulgar and meanspirited in politics synonymous： base, meanspirited excellent famous for a mean backhand marked by poverty befitting a beggar a mean hut synonymous： beggarly (used of persons or behavior) characterized by or indicative of lack of generosity a mean person synonymous： mingy, miserly, tight (used of sums of money) so small in amount as to deserve contempt synonymous： beggarly of no value or worth synonymous： bastardly
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mean /miːn//miːn/

平均数

Mean 平均数

近义词

反义词

解析

联想词