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<p>as in <a href="page.php?w=Bayesian_statistics">Bayesian statistics</a>.  We can calculate the <a href="page.php?w=posterior_distribution">posterior density</a> of  using <a href="page.php?w=Bayes%27_theorem">Bayes' theorem</a>:</p>

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:</p>

<p>where  is density function of ,  is the domain of .</p>

<p>The method of maximum a posteriori estimation then estimates  as the <a href="page.php?w=mode_%28statistics%29">mode</a> of the posterior density of this random variable:</p>

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:</p>

<p>The denominator of the posterior density (the <a href="page.php?w=marginal_likelihood">marginal likelihood</a></p><p>
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