Operation Manual

Chapter 12: Statistics 217
xyLine
xyLine (Ó)is a scatter plot in which the data points are plotted and connected in order of appearance
in Xlist and Ylist. You may want to use SortA( or SortD( to sort the lists before you plot them.
Histogram
Histogram (Ò) 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  131 must be true. A value that occurs on the edge of
a bar is counted in the bar to the right.
ModBoxplot
ModBoxplot (Õ) (modified box plot) plots one-variable data, like the regular box plot, except points
that are 1.5 … 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.
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.