Parametric statistical model
= Parametric statistical model
{title2=$\{P_\theta:\theta\in\Theta\subseteq\mathbb R^d\}$}
A <statistical model> indexed by a parameter vector of fixed finite dimension is parametric. Examples include a <normal distribution> with unknown mean and variance and a <Poisson distribution> with unknown mean. Its <likelihood function> is the joint sample density or mass function, regarded as a function of the parameter at the observed sample.