GMAT數學備考常見概念分析

　　數學是GMAT考試中容易拿下的部分，但是GMAT數學我們知道對基礎知識的要求是比較高的。我們在做題的時候常常會碰到很多概念，小編給大家分享一些數學的概念，GMAT入門的考生要記得背誦：

　　下面我們主要列出GMAT數學概念中描述統計部分詞匯：

　　1.平均數

　　2.中數

　　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 /2 = 7. Note that the mean of these numbers is 7.5.

　　3.眾數：一組數中的眾數是指出現頻率最高的數。

　　例：the mode of 7，9，6，7，2，1 is 7。

　　4.值域：表明數的分布的量，其被定義為最大值減最小值的差。

　　例：the range of1，7，27，27，36 is 36-= 37。

　　5.標準方差：

　　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:

　　find the arithmetic mean ;

　　find the differences between the mean and each of the n numbers ;

　　square each of the differences ;

　　find the average of the squared differences ;

　　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.

　　以上就是小編整理的GMAT考試數學部分常見的幾個概念，GMAT數學對于考生的基礎知識要求是比較高的。所以考生們在復習的時候要多多注意，GMAT入門的考生復習數學先從背誦基礎知識開始做起吧。

　　數學是GMAT考試中容易拿下的部分，但是GMAT數學我們知道對基礎知識的要求是比較高的。我們在做題的時候常常會碰到很多概念，小編給大家分享一些數學的概念，GMAT入門的考生要記得背誦：

　　下面我們主要列出GMAT數學概念中描述統計部分詞匯：

　　1.平均數

　　2.中數

　　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 /2 = 7. Note that the mean of these numbers is 7.5.

　　3.眾數：一組數中的眾數是指出現頻率最高的數。

　　例：the mode of 7，9，6，7，2，1 is 7。

　　4.值域：表明數的分布的量，其被定義為最大值減最小值的差。

　　例：the range of1，7，27，27，36 is 36-= 37。

　　5.標準方差：

　　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:

　　find the arithmetic mean ;

　　find the differences between the mean and each of the n numbers ;

　　square each of the differences ;

　　find the average of the squared differences ;

　　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.

　　以上就是小編整理的GMAT考試數學部分常見的幾個概念，GMAT數學對于考生的基礎知識要求是比較高的。所以考生們在復習的時候要多多注意，GMAT入門的考生復習數學先從背誦基礎知識開始做起吧。