Mr. Haley explains how to construct a cumulative frequency graph and then use it to find the media and upper/lower quartile.<br /><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dx92ykugOOgTHSovjLOY6Bo4hgNieO3HktcPlfElDm6VbNSUc0_DyUCZlpaNGvrshmbLJoSVvM_f_j03VWyPw' class='b-hbp-video b-uploaded' frameborder='0'></iframe>