青年人网24小时滚动更新
24小时滚动更新(解决问题)                       发布时间

  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,那么我们该如何来背诵这些GMAT数学基础词汇呢,新东方网GMAT频道来帮您。
  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。
  看完上面的内容你就会发现,GMAT数学基础词汇其实并没有想象中的那么复杂。可以根据分类来记忆GMAT数学基本概念词汇,加以复习与记忆。我们需要做的是能够在理解的基础上进行记忆,事半功倍。

GMAT考试主编推荐:

GMAT资格考试数学辅导:GR数学总结

GMAT数学基本概念学习技巧

GMAT数学考试中如何正确应对数据充分性问题

青年人GMAT考试QQ交流群:95446558

资讯索引栏目导航
关于我们营销中心广告联系联系我们网站地图法律声明友情链接最新更新医药更新
Copyright © 2005- 青年人网 (Qnr.Cn) All Rights Reserved 陕ICP备11003766号  
共青团陕西省委、河南省委及陕西人才中心权威支持(西安) 电 话:400-029-8884 传 真:029-85642660
百度大联盟黄金认证  十佳网络教育机构