">ci_level<a class="anchor" aria-label="anchor" href="#arg-ci-level"></a></dt>
<dd><p>Coverage probability of confidence intervals.</p></dd>


<dt id="arg-contrasts">contrasts<a class="anchor" aria-label="anchor" href="#arg-contrasts"></a></dt>
<dd><p>A vector of contrasts in the following format:
If set to <code>"difference"</code> or <code>"ratio"</code>, then \(\psi(x)-\psi(x_0)\)
or \(\psi(x) / \psi(x_0)\) are constructed, where \(x_0\) is a reference
level specified by the <code>reference</code> argume