/span></span>
<span><span class="co">#&gt; 1                 0.158931                 0.783973</span></span></code></pre></div>
<p>The risk difference is defined as <span class="math display">\[P(Response = Poor | Stressor = Poor) - P(Response
= Poor | Stressor = Good),\]</span> which measures the risk of the
response variable being in poor condition differenced by the stressor’s
condition. To estimate the risk difference of benthic macroinvertebrates
being in poor condition with a phosphorous condition c