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Chemical Applications of Statistical Analyses
Using Regression to Measure Variable Links
Description
Correlation and regression are used to study the relationship between two variables. Correlation shows how strongly the variables are associated. Regression helps describe that relationship with a line that can be used for prediction.
In linear regression, the relationship is written as a correla...
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Transcript
回归和相关性是检查两个变量之间关系的统计技术。
回归用于理解一个变量的变化是由另一个变量的变化引起的,而相关性则衡量两个变量之间线性相关性的强度和方向。
线性回归通过对数据点拟合一条线来建立两个变量之间的关系。该线的方程能够根据已知变量可靠地预测一个未知变量的值。
线性相关使用 Pearson 相关系数"r"表示,范围从 -1 到 +1。接近 −1 或 +1 的值表示变量之间具有很强的相关性,而零值表示没有相关性。
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