Texas Instruments TI-89 Manual Book page 284

Histogram This plots one-variable data as a histogram. The x axis is divided into
equal widths called buckets or bars. The height of each bar (its
value) indicates how many data points fall within the bar's range.
¦
When defining the plot, you
can specify the
Hist. Bucket
(default is 1) to set
Width
the width of each bar.
¦
A data point at the edge of
a bar is counted in the bar
to the right.
¦
( „
from the
ZoomData 9
Graph screen, Y= Editor, or
Window Editor) adjusts
and to include
xmin xmax
all data points, but it does
not adjust the y axis.
Use ¥ $ to set
and
ymin = 0 ymax =
number of data points
expected in the tallest
bar.
¦
When you trace ( ...) a
histogram, the screen
shows information about
the traced bar.
Number of bars =
xmin + Hist. Bucket Width
xmin
the
Range of
the traced
bar
Chapter 16: Statistics and Data Plots
y
xmax ì xmin
Hist. Bucket Width
Trace cursor
# of data
points in the
traced bar
267