Texas Instruments TI-83 ,

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 Q3 and the first quartile Q1.) 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. Q1, Med (median),

and Q3 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.

(Histogram)

(ModBoxplot)