ion appears in logistic regression and feedforward
          neural networks. Among other applications, United State Chess Federation
          and FIDE use it to calculate chess ratings.
        </p>
<p>
          The following graph shows how the distribution changes as the parameters
          change:
        </p>
<p>
          <span class="inlinemediaobject"><img src="../../../../graphs/logistic_pdf.svg" align="middle"></span>
        </p>
<h5>
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