This section contains statistical details for the Whole Model Test report.
The Chi-Square statistic is sometimes denoted G2 and is defined as follows:
where the summations are over all observations instead of all cells.
The ratio of this test statistic to the background log-likelihood is subtracted from 1 to calculate R2. More simply, RSquare (U) is computed as follows:
using quantities from the Whole Model Test report.
Note: RSquare (U) is also known as McFadden’s pseudo R-square.