Since there is a strong correlation between these variables and a country's wealth, they controlled for GNP per head by measuring whether it alone accounted for the difference in mating strategy.

由于这些指标与一个国家的财富密切相关，他们以人均国民生产总值为控制变量来看它是否能够单独解释择偶策略的差别。

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Ecker found there was a correlation between the severity of a person's autism and the amount of structural difference observed in their brain scans, compared with the control group.

艾克尔发现，与正常控制组相比，一个人自闭症症状的严重程度与大脑扫描中观察到的结构差异的多少存在相关性。

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The difference between them is 12.42. This mean difference implies a correlation coefficient of r = .381, which is reasonably large in any survey data.

两者之间的差是12.42. 这就是说差距暗示了一个相关系数r=.381,这在任何调查中无疑都是一个很大的系数差。

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