added definition "stat"

Author: JoramSoch

D/stat.md

@@ -0,0 +1,32 @@
+---
+layout: definition
+mathjax: true
+
+author: "Joram Soch"
+affiliation: "BCCN Berlin"
+e_mail: "joram.soch@bccn-berlin.de"
+date: 2024-10-04 10:54:22
+
+title: "Statistic"
+chapter: "General Theorems"
+section: "Probability theory"
+topic: "Random experiments"
+definition: "Sample statistic"
+
+sources:
+  - authors: "Wikipedia"
+    year: 2024
+    title: "Statistic"
+    in: "Wikipedia, the free encyclopedia"
+    pages: "retrieved on 2024-10-04"
+    url: "https://en.wikipedia.org/wiki/Statistic"
+
+def_id: "D205"
+shortcut: "stat"
+username: "JoramSoch"
+---
+
+
+**Definition:** A statistic, also "sample statistic", is any quantity calculated from the [data points](/D/data) in a [sample](/D/samp) that is used for statistical purposes.
+
+Examples include statistics used to estimate the [parameters](/D/para) of a [probability distribution](/D/dist) and [test statistics](/D/tstat) to evaluate [statistical hypotheses](/D/hyp).