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/Hypothesis Tests.md b/education/statistics/Hypothesis Tests.md
index 12d96b4..4e6d9ac 100644
--- a/education/statistics/Hypothesis Tests.md	
+++ b/education/statistics/Hypothesis Tests.md	
@@ -5,4 +5,14 @@ This test can be used if:
 - A qualitative variable of interest summarized by percentages
 - Can use a box with tickets of 1s and zeros to represent the population
 If an observed value is too many SEs away from the expected value, it is hard to explain by chance.
-## c tests for averages
+### Null Hypotheses
+A statement about a parameter, a statement of equality. The chance of getting an *x* is *y*%.
+An alternative hypothesis, or a research hypotheses, is what the researcher is out to prove. A statement of inequality (<, >, $\ne$).
+
+| Term | Description |
+| ---- | ---- |
+| Null Hypothesis | This is a statement about a *parameter* |
+| Alternative/Research Hypothesis |  |
+| One-tailed test | Use when the alternative hypothesis says that the % of 1s is less than or greater than expected. It's one sided |
+ 
+ ## c tests for averages