size in square meters)</p></li>
<li><p><code>location</code> (<code>factor</code> with two levels <code>SanJorge</code> and <code>Mendebaldea</code>)</p></li>
</ul></div>
    <div id="references">
    <h2>References</h2>
    <p>Ugarte, M. D., Militino, A. F., and Arnholt, A. T. 2015. <em>Probability and Statistics with R</em>, Second Edition. Chapman &amp; Hall / CRC.</p>
    </div>

    <div id="ref-examples">
    <h2>Examples</h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-