For extra practice:)

Interquartile Range sites:
~http://www.cwcboe.org/cms/lib04/NJ01001185/Centricity/Domain/240/Interquartile%20Range%20HW.doc
~http://www.mathsisfun.com/data/quartiles.html

Mean Absolute Deviation:
~http://m.youtube.com/watch?v=z9AJk7TvdpQ
~http://www.ixl.com/math/algebra-1/mean-absolute-deviation
~http://www.mathworksheetsland.com/stats/2standarddev/lesson.pdf
~http://www.mathworksheetsland.com/stats/2standarddev/ip.pdf

*you must copy and paste