光大彩票手机app_光大彩票手机版登录-下载中心

收缩
  • 电话咨询

  • 400-696-4919
您好,欢迎进入光大彩票手机app官方网站!
一站式
高端出国留学请拨咨询热线 400-696-4919
GMAT 美国商学院研究生入学考试

GMAT数学中5个最容易遗忘混淆的高频词汇

浏览次数:1199次 发布时间:2017/10/28 9:56:27 【关闭】 字体: 

  GMAT数学基础词汇中,有一类词汇比较特殊,数量不多,但往往都是特殊词汇,不是太好理解,那么大家该如何来背诵这些GMAT数学有关的统计基础词汇呢? 以下将为大家做GMAT数学中5个最容易遗忘混淆的高频词汇逐一先容。  

       1.平均数(average or arithmetic mean. 
 
       2.中数(median)

  To calculate the median of n numbers,first order the numbers from least to greatest;if n is odd,the median is defined as the middle number,while if n is even,the median is defined as the average of the two middle numbers. For the data 6, 4, 7, 10, 4, the numbers, in order, are 4, 4, 6, 7, 10, and the median is 6, the middle number. For the numbers 4, 6, 6, 8, 9, 12, the median is (6+8 )/2 = 7. Note that the mean of these numbers is 7.5

       3.众数(mode):一组数中的众数是指出现频率最高的数。

       例:the mode of 7,9,6,7,2,1 is 7。

       4.值域(range):表明数的分布的量,其被定义为最大值减最小值的差。

       例:the range of–1,7,27,27,36 is 36-(-1)= 37。

       5.标准方差(standard deviation):

       One of the most common measures of dispersion is the standard deviation. Generally speaking, the greater the data are spread away from the mean, the greater the standard deviation. The standard deviation of n numbers can be calculated as follows:

       (1)find the arithmetic mean

       (2)find the differences between the mean and each of the n numbers

       (3)square each of the differences

       (4)find the average of the squared differences

       (5)take the nonnegative square root of this average.

       Notice that the standard deviation depends on every data value, although it depends most on values that are farthest from the mean. This is why a distribution with data grouped closely around the mean will have a smaller standard deviation than data spread far from the mean.

       GMAT数学的基本概念,其实没有想象中那么复杂和混乱。可以根据归类的GMAT数学基本概念词汇,加以复习和记忆。值得注意的是,GMAT数学的基本概念,最忌讳的是死记硬背,最好采用理解式记忆法,基本概念就能轻松搞定。


电话:400-696-4919 网址:光大彩票手机app下载 地址:光大彩票手机版登录

凯文国际教育 托福雅思教育咨询 内蒙古光大彩票手机app 呼和浩特光大彩票手机app 呼和浩特雅思培训 呼和浩特托福培训 呼和浩特留学 呼和浩特国际教育 呼和浩特出国留学 呼和浩特留学语言培训

版权所有:光大彩票手机app 蒙ICP备16000195号 网站建设:国风网络  蒙公网安备 15010502000506号
XML 地图 | Sitemap 地图