Tree Model Diagram
The tree model diagram has so many nodes that it may be difficult to see the whole model at once at a size where you can still read the node content information. You can use the tree map to see the entire tree:
- Double-click the tree in the Viewer to open the Tree Editor.
- From the Tree Editor menus choose:
- The tree map shows the entire tree. You can change the size of the tree map window, and it will grow or shrink the map display of the tree to fit the window size.
- The highlighted area in the tree map is the area of the tree currently displayed in the Tree Editor.
- You can use the tree map to navigate the tree and select nodes.
See the topic Tree Map for more information.
For scale dependent variables, each node shows the mean and standard deviation of the dependent variable. Node 0 displays an overall mean vehicle purchase price of about 29.9 (in thousands), with a standard deviation of about 21.6.
- Node 1, which represents cases with an income of less than 75 (also in thousands) has a mean vehicle price of only 18.7.
- In contrast, node 2, which represents cases with an income of 75 or more, has a mean vehicle price of 60.9.
Further investigation of the tree would show that age and education also display a relationship with vehicle purchase price, but right now we're primarily interested in the practical application of the model rather than a detailed examination of its components.