From 75742da7c6579a632e45bf00668477f8381455aa Mon Sep 17 00:00:00 2001 From: zleyyij Date: Tue, 2 Jan 2024 14:09:01 -0700 Subject: [PATCH] vault backup: 2024-01-02 14:09:01 --- education/statistics/Correlation and Regression.md | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/education/statistics/Correlation and Regression.md b/education/statistics/Correlation and Regression.md index b0cc824..7dd9c34 100644 --- a/education/statistics/Correlation and Regression.md +++ b/education/statistics/Correlation and Regression.md @@ -110,7 +110,8 @@ The distance of an individual point from the regression line. This only applies - `residual = observed - predicted` for a given $x$ value - The r.m.s error is the r.m.s size of the errors $$ \sqrt{1-r^2}(\sigma_y) $$ - +- On a least squared regression line, the 1 r.m.s error away will contain $2\sigma$ of the data, and it should loosely mirror a normal curve. +- To approximate the R.M.S error for a scatter diagram, take a high value and a low value for a given $x$ coordinate, and divide by 4, because r.m.s error is within $2\sigma$ of either side of the line. --- # Terminology