<p>^^ look at my post, I edited it to explain where the z-critical value comes from. It is an approximation of 99.6%, since it is between 99.5% and 99.8%.</p>
<p>^^ look at my post, I edited it to explain where the z-critical value comes from. It is an approximation of 99.6%, since it is between 99.5% and 99.8%.</p>