三、相关系数应用中需注意的几个问题1、要分清相关密切程度与相关显著与否的含义。相对系数绝对值大小,反映的是事物间关系的密切程度,数值愈大(愈接近于1)反映二变数间关系愈接近直线关系,即在直线相关上关系愈密切。这个数值是受两事物本身的性质所决定的。而相关显著与否是指所测得样本相关系数在代表总体相关 Third, the correlation coefficient Several issues need to be noted in the application 1, we must distinguish between the relevant level of relevance and the significance of significant or not. The absolute value of the relative coefficient, reflecting the close relationship between the things, the larger the value (closer to 1) reflect the closer relationship between the two variables linear relationship, that is, the closer the relationship between the straight line. This value is determined by the nature of the two things. And whether the correlation is significant or not means that the correlation coefficient of the measured samples is representative of the overall correlation