\BeginKnitrBlock{exercise}\iffalse{-91-84-104-101-32-109-101-97-110-93-}\fi{}<div class="exercise"><span class="exercise" id="exr:unnamed-chunk-24"><strong>(\#exr:unnamed-chunk-24)  \iffalse (The mean) \fi{} </strong></span>Calculate the mean for number of antennae, once wih the original data and once imagining the $10th$ value was 107 antennae, instead of 9. What do the results imply for the mean in terms of its robustness to outliers? Does it make sense to calculate the mean number of antennae?</div>\EndKnitrBlock{exercise}