\BeginKnitrBlock{exercise}\iffalse{-91-69-120-112-108-111-114-105-110-103-32-116-104-101-32-78-111-114-109-97-108-32-100-105-115-116-114-105-98-117-116-105-111-110-93-}\fi{}<div class="exercise"><span class="exercise" id="exr:unnamed-chunk-41"><strong>(\#exr:unnamed-chunk-41)  \iffalse (Exploring the Normal distribution) \fi{} </strong></span>Consider the model that the height of Martians at site I can be described by the Normal distribution of $\mu = 200$ cm and $\sigma = 6$ cm. 95 % of Martians at site I fall into what interval?</div>\EndKnitrBlock{exercise}