Decision Tree: What are the Node Details?

The Node Details displays a selection of the statistics relating to the focus node. These are the same statistics that are available in the Tree Grid, but the Node Details emphasises the relationship between them.

The right hand side displays information relating to the Root Node (this will always be the same):

Analysis Count = 25,175
Non-Analysis Count = 1,131,378
Base Count = 1,156,553 (Analysis Count + Non-Analysis Count)
Analysis Percent = 2.18% (Analysis Count / Base Count)
Non-Analysis Percent = 97.82% (Non-Analysis Count / Base Count)

The left hand side displays information relating to the focus node (will change as you move mouse):

Analysis Count = 17,463
Non-Analysis Count = 286,863
Base Count = 304,326 (Analysis Count + Non-Analysis Count)
Analysis Percent = 5.74% (Analysis Count / Base Count)

This is a key statistic and represents how "good" the node is (width of red stripe on torus)
Non-Analysis Percent = 94.26% (Non-Analysis Count / Base Count)

The middle column shows the focus node counts as a percentage of the root node:

% of Analysis = 69.37% (Focus node Analysis Count / Root node Analysis Count)
% of Non-Analysis = 25.36% (Focus node Non-Analysis Count / Root node Non-Analysis Count)
% of Base = 26.31% (Focus node Base Count / Root node Base Count)

A fuller torus indicates a higher "%of Base", i.e. more of the root node are in the focus node

The bottom row give some key summary statistics indicating how "good" the node is:

Gain = 2.64 (Focus Analysis % / Root Analysis %)

Shown below the Focus Node Analysis %, as this is the key value in driving the Gain
Index = 273.58 (% of Analysis / % of Non-Analysis)

Shown below the "% of..." column, as these are the values driving the Index
Z-Score = 134.64

Based on Focus Node Analysis %, Root Node Analysis %, Focus Base Count

For more details of the statistics, see the section What can I learn from the Tree Grid? and Statistical Terminology