由于抽样变异性和模型选择所引起的不确定性应在展示疾病负担结果的时候予以说明。

The uncertainty owing to both the sampling variability and the choice of model (s) should be given when disease burden results are presented.

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在统计学术语中，这个抽样可变性说明被称为虚假设(null hypothesis)。

In statistical terminology, this sampling variability explanation is called the null hypotheses. (the null hypothesis is designated by the symbol Ho.)

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最后，我演示了如何模拟不同自由度的x平方分布的抽样分布，而不只是仅说明其来源。

Finally, I demonstrated how to simulate the Chi Square sampling distribution for different degrees of freedom, going beyond simply commenting on its derivation.

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