span class="r-in"><span>  ratio <span class="op">=</span> <span class="fl">100</span>,</span></span>
<span class="r-in"><span>  start_mean <span class="op">=</span> <span class="fl">12</span>,</span></span>
<span class="r-in"><span>  start_sd <span class="op">=</span> <span class="fl">4</span>,</span></span>
<span class="r-in"><span>  duration_mean <span class="op">=</span> <span class="fl">3</span>,</span></span>
<span class="r-in"><span>  duration_sd <span class="op">=</span> <span class="fl">2</span>,</s