Table 2.

Output from a GEE multiple regression of focal group–intergroup interaction success probability versus relative group size (focal group size minus opposing group size) and location (distance from focal group's home range center in meters)

Variable	Parameter estimate	Standard error	χ21	P
Intercept	1.56	0.63	6.2	0.01
Relative group size	−0.07	0.07	1.2	0.28
Location	−0.39	0.18	4.6	0.03
Group size by location	0.05	0.02	4.0	0.05