corrected some pages

Several small mistakes/errors were corrected in several proofs/definitions.

Author: JoramSoch

P/cuni-dent.md

@@ -5,7 +5,7 @@ mathjax: true
 author: "Joram Soch"
 affiliation: "BCCN Berlin"
 e_mail: "joram.soch@bccn-berlin.de"
-date: 20221-12-20 18:21:00
+date: 2021-12-20 18:21:00
 
 title: "Differential entropy of the continuous uniform distribution"
 chapter: "Probability Distributions"

P/cuni-var.md

@@ -5,7 +5,7 @@ mathjax: true
 author: "Joram Soch"
 affiliation: "BCCN Berlin"
 e_mail: "joram.soch@bccn-berlin.de"
-date: 20221-12-20 18:04:00
+date: 2021-12-20 18:04:00
 
 title: "Variance of the continuous uniform distribution"
 chapter: "Probability Distributions"

P/mlr-rssdist.md

@@ -33,6 +33,12 @@ sources:
     in: "Wikipedia, the free encyclopedia"
     pages: "retrieved on 2022-12-13"
     url: "https://en.wikipedia.org/wiki/Ordinary_least_squares#Estimation"
+  - authors: "ocram"
+    year: 2022
+    title: "Why is RSS distributed chi square times n-p?"
+    in: "StackExchange CrossValidated"
+    pages: "retrieved on 2022-12-21"
+    url: "https://stats.stackexchange.com/a/20230"
 
 proof_id: "P390"
 shortcut: "mlr-rssdist"

P/resvar-bias.md

@@ -11,7 +11,7 @@ title: "Maximum likelihood estimator of variance is biased"
 chapter: "Model Selection"
 section: "Goodness-of-fit measures"
 topic: "Residual variance"
-theorem: "Maximum likelihood estimator is biased"
+theorem: "Maximum likelihood estimator is biased (p = 1)"
 
 sources:
   - authors: "Liang, Dawen"