研究发现埃尔·尼诺、太阳黑子相对数、西太平洋副高综合指数与旱涝变化规律有很好的对应关系，并有很高的相关系数。

It is found that el Nino, relative sunspot number and sub-high integrated index in west Pacific well correspond to the regularity of drought and flood.

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传染病与智力水平的相关系数是67%，随机产生想要产生这种结果的机率不到1/10000。但是有相互关系，并一定是因果关系，因此埃皮格和他的同事们设法排除其它可能的解释。

The correlation is about 67%, and the chance that it might have come about at random is less than one in 10,000.

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