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如何找一列数的中位数

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共同创作者是 Jake Adams

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中位数即一个数列或一列数的“中间的数”。当你找一列含奇数个数的数列的中位数的时候，是很容易的。找含偶数个数的数列中位数会更难一点。请读下文来了解具体方法。

方法 1

方法 1 的 2:

找含奇数个数的数列的中位数

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如果它们是杂乱无章的，请将它们排序，从最小的数开始，以最大的数结束。
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2
找到完全在最中间的那个数。 这表明，中位数的前边和后边有同样多的数字。数清楚，确保是对的。
- 3前面有两个数，后面也有两个数。因此3就是完全在中间的那个数。
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奇数数列的中位数总是在这个数列本身里的一个数。从来不会是没有在这个数列中出现的数。

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方法 2

方法 2 的 2:

找偶数个数的数列的中位数

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同样的，使用跟方法一相同的步骤。一个含偶数个数的数列将会有两个数在中间。
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2和3都在中间，所以你需要将它们加起来再除以2.算平均数的公式是（两个数的和）÷ 2
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一列含偶数个数的数列中位数不需要是数列中的一个数。

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