Texas Instruments TI-89 Voyage 200, User Manual

Page: 556 / 1008

Statistics and Data Plots 556
Box Plot
Box Plot Box Plot
Box Plot
This plots one-variable data with respect to the minimum and maximum data points
(
minX
and
maxX
) in the set.
• When you select multiple box plots, they are plotted one above the other in the same
order as their plot numbers.
• Use NewPlot to show statistical data as a modified box plot.
• Select Mod Box Plot as the Plot Type when you define a plot in the Data/Matrix
Editor.
A modified box plot excludes points outside the interval [
Q1 N X, Q3+X
], where X is defined
as
1.5 (Q3
N
Q1)
. These points, called outliers, are plotted individually beyond the box
plot’s whiskers, using the mark that you select.
• A box is defined by its first quartile (
Q1
),
median (
Med
), and third quartile (
Q3
).
• Whiskers extend from
minX
to
Q1
and
from
Q3
to
maxX
.
Q1 Med Q3
minx maxX