Definition: Constant
Index:
The Book of Statistical Proofs ▷
General Theorems ▷
Probability theory ▷
Random variables ▷
Constant
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Metadata: ID: D96 | shortcut: const | author: JoramSoch | date: 2020-09-09, 01:30.
Definition: A constant is a quantity which does not change and thus always has the same value. From a statistical perspective, a constant is a random variable which is equal to its expected value
\[\label{eq:EX} X = \mathrm{E}(X)\]or equivalently, whose variance is zero
\[\label{eq:VarX} \mathrm{Var}(X) = 0 \; .\]- ProofWiki (2020): "Definition: Constant"; in: ProofWiki, retrieved on 2020-09-09; URL: https://proofwiki.org/wiki/Definition:Constant#Definition.
Metadata: ID: D96 | shortcut: const | author: JoramSoch | date: 2020-09-09, 01:30.