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12-32 Statistics
8312STAT.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:42 PM Printed: 02/19/01 1:37
PM Page 32 of 38
Histogram plots one-variable data. The Xscl window variable
value determines the width of each bar, beginning at
Xmin.
ZoomStat adjusts Xmin, Xmax, Ymin, and Ymax to include all
values, and also adjusts
Xscl. The inequality
(
Xmax
N
Xmin)
à
Xscl
47 must be true. A value that occurs
on the edge of a bar is counted in the bar to the right.
ModBoxplot (modified box plot) plots one-variable data,
like the regular box plot, except points that are 1.5
ä
Interquartile Range beyond the quartiles. (The Interquartile
Range is defined as the difference between the third
quartile
Q
3
and the first quartile Q
1
.) These points are
plotted individually beyond the whisker, using the
Mark
(
›
or +
or
¦
) you select. You can trace these points, which
are called outliers.
The prompt for outlier points is
x=, except when the outlier
is the maximum point (
maxX) or the minimum point
(
minX). When outliers exist, the end of each whisker will
display
x=. When no outliers exist, minX and maxX are the
prompts for the end of each whisker.
Q
1
, Med (median),
and
Q
3
define the box (page 12
.
29).
Box plots are plotted with respect to
Xmin and Xmax, but
ignore
Ymin and Ymax. When two box plots are plotted, the
first one plots at the top of the screen and the second plots
in the middle. When three are plotted, the first one plots at
the top, the second in the middle, and the third at the
bottom.
Ò
(Histogram)
Õ
(ModBoxplot)