pearson相关

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--- pearson相关 [2023/04/05 12:24] – yunyuqu
+++ pearson相关 [2024/04/12 16:23] (当前版本) – [Pearson correlation analysis] zwz
@@ 行 22: / 行 22: @@
   - 数据中的分数范围对相关有非常大的影响
   - 非常值会对相关系数产生非常大的影响
-  - 解释关系强度应考虑 r2,不只是 r
+  - 解释关系强度应考虑 r²,不只是 r
   * r＞0.7高度相关；
   * 0.5＜r＜0.7中度相关；
@@ 行 28: / 行 28: @@
 ----
+====Pearson correlation analysis====
+**1.Purpose**
+  * Measure the degree and direction of linear correlation between two variables (generally used for isometric and proportional data)
+----
+**2.Definition formula**
+  * also known as product moment correlation
+  * {{:r.png?250 |}}
+  *
+  * {{:r公式.png?120 |}}
+----
+**3.Calculating SP ( compared with SS)**
+  * {{:ss与sp公式.png?500 |}}
+----
+**4.Interpretation of Pearson's correlation**
+  - correlation≠causal relationship
+  - The range of scores in the data has a very large impact on the correlation.
+  - Extraordinary values can have a very large effect on the correlation coefficient
+  - Interpretation of the strength of the relationship should take into account r², not just r.
+  * r＞0.7 is highly correlated；
+  * 0.5＜r＜0.7 is moderately correlated；
+  * The correlation is only statistically significant for r > 0.3.

pearson相关.1680697491.txt.gz · 最后更改: 2023/04/05 12:24 由 yunyuqu