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.
如果考生将GMAT数学概念加以归类,思路会更清晰。考生可以根据归类的GMAT数学概念加以复习。对于GMAT数学概念切莫死记硬背,在理解的基础进行记忆一方面是比较方便记忆,一方面还能真正理解单词的含义,提高准确性。
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