This video goes through the steps of finding the median using the 1 - variable stats function on a TI84. The same steps can be used on the TI83 but note that if you have a brand new TI84 the screens may look slightly different. Overall, the steps will still be the same! The article that goes with this is: http://www.mathbootcamps.com/finding-the-median-by-hand-using-the-ti8384-and-using-excel/