\BeginKnitrBlock{exercise}\iffalse{-91-70-105-110-105-116-101-32-118-101-114-115-117-115-32-105-110-102-105-110-105-116-101-32-112-111-112-117-108-97-116-105-111-110-115-93-}\fi{}<div class="exercise"><span class="exercise" id="exr:unnamed-chunk-5"><strong>(\#exr:unnamed-chunk-5)  \iffalse (Finite versus infinite populations) \fi{} </strong></span>Which of the populations above can be described as infinite?</div>\EndKnitrBlock{exercise}