From 41b48cd310e2567f3727b9cdaad6fe9a6ebcb4ad Mon Sep 17 00:00:00 2001 From: zleyyij Date: Mon, 5 Feb 2024 14:19:23 -0700 Subject: [PATCH] vault backup: 2024-02-05 14:19:23 --- .obsidian/plugins/obsidian-git/data.json | 2 +- education/statistics/Hypothesis Tests.md | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) 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 5820072..d9a3580 100644 --- a/education/statistics/Hypothesis Tests.md +++ b/education/statistics/Hypothesis Tests.md @@ -30,6 +30,9 @@ With a small sample size, the standard deviation will be relatively higher, so t $$ SD_+ = \sqrt{\frac{size\space sample}{sample\space size}}*SD$$ This found value is then used in all further calculations where you would normally use the $SD$ in a z score test. $$ t = \frac{obs_{ave} - EV_{ave}}{SE_{ave}} $$ +The student curve is then used instead of the normal curve. It is similar, but has more area under the tails. + +Degrees of freedom ($df$) can be found by subtracting 1 from the sample size. The lower the degree of freedom, the greater the difference between the student curve and the normal curve. ## P Value The chance of observing at least a sample statistic, or something more extreme, if the null hypothesis is true. If the p-value is less than *5*%, reject the null hypothesis.