diff --git a/.obsidian/plugins/obsidian-git/data.json b/.obsidian/plugins/obsidian-git/data.json
index 7b1247f..4bc189e 100644
--- a/.obsidian/plugins/obsidian-git/data.json
+++ b/.obsidian/plugins/obsidian-git/data.json
@@ -2,7 +2,7 @@
   "commitMessage": "vault backup: {{date}}",
   "autoCommitMessage": "vault backup: {{date}}",
   "commitDateFormat": "YYYY-MM-DD HH:mm:ss",
-  "autoSaveInterval": 1,
+  "autoSaveInterval": 5,
   "autoPushInterval": 0,
   "autoPullInterval": 5,
   "autoPullOnBoot": false,
diff --git a/education/statistics/Correlation and Regression.md b/education/statistics/Correlation and Regression.md
index 951e6f6..1403707 100644
--- a/education/statistics/Correlation and Regression.md	
+++ b/education/statistics/Correlation and Regression.md	
@@ -55,4 +55,7 @@ https://www.thoughtco.com/how-to-calculate-the-correlation-coefficient-3126228
 - The correlation coefficient can be misleading in the presence of outliers or nonlinear association. 
 - $r$ only shows the strength of a linear relationship.
 - High $r$ only indicates high correlation, not causation.
-- $r$ is not a linear, perfect scale. An $r$ of 0.8 does not mean twice as much linearity as an $r$ of 0.4
\ No newline at end of file
+- $r$ is not a linear, perfect scale. An $r$ of 0.8 does not mean twice as much linearity as an $r$ of 0.4
+### Ecological Correlations
+- Sometimes each point on the plot represents the average or rate for a whole group of individuals. 
+- Ecological correlations are artificially strong
\ No newline at end of file