="references.html#fn2" class="footnote-ref" id="fnref2"><sup>2</sup></a> The sample deviation is defined as the square root
of the sample deviation, but is not unbiased.</p>
<!-- real; mean; (real[] x); -->
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<p><code>real</code> <strong><code>mean</code></strong><code>(real[] x)</code><br>
The sample mean of the elements in x. For an array <span class="math inline">\(x\)</span> of size <span class="math inline">\(N &gt; 0\)</span>, <span class="math display">\[ \text{mean}(x) \ = \ \bar{x} \ = \ \fra