="math inline">\(\overline{Y}\)</span>), and the formula for its computation is
<span class="math display" id="eq:definition-sample-mean">\[\begin{equation}
\overline{Y} = \frac{\sum_{i=1}^n Y_i}{n}
\tag{1.1}
\end{equation}\]</span>
Perhaps this is the first time you have seen the “summation operator” <span class="math inline">\(\Sigma\)</span>, so let’s go over how to work with this. Basically, the summation operator states that you should sum up every value of a variable that is placed to the right 