An analysis was done on road accidents data (n = 100) where the number of accidents (Y) is regressed to two road safety programs; theory only (X1 = 0) and theory and practical (X1 = 1) and gender (X2: 0 = female, 1 = male). Part of the output is as follows:

Call : glm ( formula = Y ~ X1 + X2, family = poisson, data = accidents) Coefficients : Estimate Std. Error z value (Intercept) 0. 409 0 . 1225 3.3359 X1 1. 047 0. 1330 7. 8742 X2 0. 092 0. 1165 0. 7899