Under "Graphs | 3D Seq | Bivariate Histograms", you check "Total count" and "Chi-square" statistics from the "Advanced Tab". But the bivariate histogram will not show the statistics in the graph for some old versions of Statistica. This article shows the workaround to get the requested statistics.

1. After the bivariate graph is generated, double click the graph background to access Graph Options dialog
2. Under "Graph Options | Plot | Histogram", click "Statistics..." to access Statistics dialog and select "Total Count" and "Chi-square"

3. Close "Statistics" dialog and click "OK" in the prompted dialog and also in the Graph Options dialog
4. The statistics will display on the title of the graph