USING THE TI-83 FOR HISTOGRAMS

1) First, clear your lists: press STAT, go to 4, Enter, 2nd L1, 2nd L2, Enter (see done).

2) Now, press STAT, stay at 1, Enter (should see empty lists). Move cursor to left list L1 & enter the midpoints of each interval (this is the horizontal axis) (X axis). You can do it by (left value+right value)/ 2 Enter for each one

3) Once all those are entered, move cursor to L2 & enter each frequency. 

4) Now, press 2nd STAT plot, stay at 1, Enter, make sure ON is blinking & darken, Enter, move cursor to third on the top (displays Histogram plot), Enter, move to L1, enter, move to L2 (if L2 is not there, clear the 1 and write freq: L2 using 2nd,2, enter, then press Graph or zoom 9 (see note below)

Note: In many cases, when using Zoom 9, the rectangles are not located adjacent to one another, so the Xsci (class width) must be adjusted.  Do below, then hit Graph (not Zoom 9 again).

Adjusting the viewing window manually:  Press window. For Xmin use the smallest X (data value) & for Xmax, the largest.  For Xsci use the class width (width of each interval).  For Ymin, use 0, for Ymax, use a little more the the largest frequency. Then press Graph.