Pre-Algebra Students:
Below is a link to youtube to watch a tutorial on how to complete a box and whisker plot.

http://www.youtube.com/watch?v=GMb6HaLXmjY

And below is a link to a powerpoint on how to complete a box and whisker plot

http://teacherweb.com/CA/VandenbergMiddleSchool/MsBuckley/BoxandWhiskerPlots.ppt

Also, below is a link to hotmath.com and it will help with some of the problems in your book that have been assigned in class. I will show you how to use it on Wednesday. Hope all of this helps you.
http://hotmath.com/help/bookindexes/cpmffa202/index.html#pid=index