\BeginKnitrBlock{exercise}\iffalse{-91-83-107-101-119-101-100-32-118-97-114-105-97-98-108-101-115-93-}\fi{}<div class="exercise"><span class="exercise" id="exr:unnamed-chunk-29"><strong>(\#exr:unnamed-chunk-29)  \iffalse (Skewed variables) \fi{} </strong></span>Give an example of a positively or negatively-skewed variable that you will encounter in your own work.</div>\EndKnitrBlock{exercise}