Application Guide
352 Data&Statistics Application
- Drag a dot to move it. As you move a point, the values associated with it
change on the work area display and in the list for the variable.
- Activate the Graph Trace tool and press ◄or► to move across the data
points in the plot in list order. Points enlarge and display a bold outline as you
move across them in Trace mode.
Creating Box Plots
The Box Plot Tool plots one-variable data in a modified box plot. “Whiskers” extend
from each end of the box, either to 1.5 times the interquartile range or to the end of
the data, whichever comes first. Points that are a width of 1.5*Interquartile Range
past the quartiles plot individually, beyond the whiskers. These points are the potential
outliers. When no outliers exist, x-min and x-max are the prompt for the end of each
whisker.
Box plots are useful for comparing two or more sets of data that use the same scale. If
a dataset is large, a box plot can also be useful in exploring data distribution.
1. Click the Add Variable region in the center of an axis. The default plot for one
numeric variable is a dot plot. For more information, see Plotting Variables.
Note: If two variables are plotted in the work area, you can create a dot plot by
removing one variable. Choose RemoveXVariable or RemoveYVariable from the
Plot Types menu.
2. On the Plot Types menu, click Box Plot.