改进格式
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@@ -34,11 +34,11 @@ $$
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\displaystyle{F(x)=P(X\leq x)}
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$$
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以最为常见的均匀分布概率为例,设均匀分布的随机变量$X$的取值范围是$[a,b]$,那么它的累计分布函数以及函数图像是
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<table align="center" class="invisibletable">
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<div align="center">
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<table class="invisibletable">
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<tbody>
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<tr>
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<td style="vertical-align:middle; border:0px;">
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<td>
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$$
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F(x)=\begin{cases}
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@@ -49,12 +49,13 @@ F(x)=\begin{cases}
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$$
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</td>
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<td style="vertical-align:middle; border:0px;">
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<td>
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<img src="/images/2015/05/rnd_03.gif">
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</td>
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</tr><tr>
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</tr></tbody>
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</table>
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</div>
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对于一个累计分布函数,符合以下规律
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* $0\le F(x)\le 1$
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