Texas Instruments TINSPIRE Teacher Software Guidebook - Page 615

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. Using Data & Statistics 603