Texas Instruments TINSPIRE

Using Data & Statistics 603
1. To create a dot plot, click the Add Variable region in the center of an
axis and click the name of a numeric variable. For more details, see
Plotting variables.
2. (Optional) To split a dot plot by category, click the Add Variable
region on the other axis and choose the list that contains the
corresponding category data.
3. (Optional) To plot multiple dot plots, choose
Add X Variable on the
Plot Properties menu and select a numeric variable from the list that
displays.
A second dot plot appears on the work area and the name of the
plotted variable is added to both axis labels.
4. Explore the plotted data.
– Hover over a data point to display data values.
– Click and 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 7 or 8 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. See Plotting variables for more
details about plotting data.