GMAT考试数学基本概念整理
<p> <span word="GMAT">GMAT</span>考试中概念最多的要属<span word="GMAT">GMAT</span>数学了。考生在备考<span word="GMAT">GMAT</span>数学时都会有一大批数学的基本概念等着大家去背。这些是<span word="GMAT">GMAT</span>数学题的基础，考生还必须牢记不能有半点差错。小编接下来为大家整理出常用的<span word="GMAT">GMAT</span>数学概念供考生复习。</p><p> 以下就是<span word="GMAT">GMAT</span>数学中的常见概念，这些概念在<span word="GMAT">GMAT</span>数学题中经常被考到，大家在备战<span word="GMAT">GMAT</span>考试中要多加留意。</p><p> 1.<span word="mode">mode</span></p><p> 一堆数中出现频率最高的一个或几个数</p><p> 2.<span word="range">range</span></p><p> 一堆数中最大和最小数之差</p><p> 3.<span word="mean">mean</span></p><p> <span word="arithmatic">arithmatic</span> <span word="mean">mean</span></p><p> <span word="geometric">geometric</span> <span word="mean">mean</span> <span word="n">n</span>个数之积的<span word="n">n</span>次方根</p><p> 4.<span word="median">median</span></p><p> 将一堆数排序之后，正中间的一个数， 或者中间两个数的平均数/2=6 )</p><p> 5.<span word="standard">standard</span> <span word="error">error</span></p><p> 一堆数中，每个数与平均数的差的绝对值之和，除以这堆数的个数<span word="e">e</span>.<span word="g">g</span>. <span word="standard">standard</span> <span word="error">error</span> <span word="of">of</span> 0,2,5,7,6 <span word="is">is</span>: /5=2.4 )</p><p> 6.<span word="standard">standard</span> <span word="variation">variation</span></p><p> 一堆数中，每个数与平均数之差的平方之和，再除以<span word="ne">ne</span>.<span word="g">g</span>. <span word="standard">standard</span> <span word="variation">variation</span> <span word="of">of</span> 0,2,5,7,6 <span word="is">is</span>:_ 2 2 2 2 2_|_ ++++_|/5=6.8</p><p> 7.<span word="standard">standard</span> <span word="deviation">deviation</span></p><p> 就是<span word="standard">standard</span> <span word="variation">variation</span>的平方根</p><p> 标准方差的公式：<span word="d">d</span>^2=/<span word="n">n</span></p><p> <span word="d">d</span> 为标准方差</p>
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