关闭

澳际学费在线支付平台

GAMT考试 数学统计的解题策略.

刚刚更新 编辑: 浏览次数:239 移动端

  在GMAT数学的备考中,了解GMAT数学词汇和对数学概念的了解都是很重要的,在GMAT考试中,经常过出现关于数学统计的问题,下面澳际小编为您讲解GAMT考试 数学统计的解题策略。

  在参加GMAT考试前,大家都会细心备考GMAT数学词汇,除此之外,GMAT数学备考之描述统计,包括:平均数、中数、众数、值域以及标准方差。

  gmat数学备考之描述统计(descriptive statistics)

  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 dined as the middle number,while if n is even,the median is dined 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.

  以上是澳际小编总结的数学统计的解题策略。在GMAT考试中,GMAT数学的概念和GMAT数学词汇会令学生们头疼,学生们通常觉得复杂和混乱,澳际小编建议,生最好采用理解式记忆法,GMAT数学基本概念就能轻松搞定。

  澳际六步曲第二步为您进行考试指导,澳际培训核心思维颠覆国内传统大班无差异化批发模式,采取一对一个性化教学,辅之小班精英辅导应试方法和学生英语能力结合,考试辅导和留学规划一体化行动,学生国际化英语思维构建及西方人文知识和视野的开拓并重。

  我们具体的服务项目如下:

  1. 免费测评模考,分析申请人的问题,制作考试测评报告和备考指导

  2. 结合申请人的申请目标和考试基础,制定考试整体规划及时间安排

  3. 提供对申请人有帮助的考试经验和机经等

  4. 根据需要提供免费口语模拟和指导服务

  5. 免费修改作文4篇

  6. 考前心理指导,调整考前心理状态

  • 澳际QQ群:610247479
  • 澳际QQ群:445186879
  • 澳际QQ群:414525537