laims <span class="op">=</span> <span class="va">nclaims</span>, x <span class="op">=</span> <span class="va">age_policyholder</span>,</span></span>
<span class="r-in"><span>exposure <span class="op">=</span> <span class="va">exposure</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>            x  predicted     lwr_95    upr_95</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 1   18.00000 0.33683705 0.21781040 0.5209081</span>
<span class="r-ou