That let her apply a statistical technique called principal-component analysis to the data, to work out the dimensions of chimpanzee personality.

从而弗里曼在数据整理中获得一项称之为“优先分析部分”的统计技术，提高界定黑猩猩性格维度的工作效率。

In 1947, Richard Doll and A. Bradford Hill of the British Medical Research Council created a sophisticated statistical technique to document the association between rising rates of lung cancer and increasing numbers of smokers.

到了二战后，流行病学思想取得了不少重大突破。 1947 年，英国医学研究会的理查德 ﹒ 多尔和 A ﹒ 布德福德 ﹒ 希尔创立了一种复杂的统计方法，以记录肺癌上升率和烟民增加之间的关系。