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大白菜叶中铅的含量与其生长环境——土壤中铅的含量有着一定的相关性。本文采用元素相关分析法,以土壤中铅的含量作为内参比元素,计算其相应位置上大白菜叶中铅的含量之间的相关性。凡与内参比元素相关显著的元素,都反应了它的自然水平,并根据95%的置信域判断这些观察值是否异常。
Chinese cabbage leaf lead content and its growth environment - the content of lead in soil has a certain relevance. In this paper, elemental correlation analysis method, the content of lead in the soil as an internal reference element, calculate the corresponding position of Chinese cabbage leaf lead content correlation. All elements that are significant to the internal reference element reflect its natural level and determine whether these observations are abnormal based on a 95% confidence level.