y_response x1_covariate1 x2_covariate2 1 1 -0.405739383 1 1 0.321576427 0 1 0.243091307 1 1 0.345095873 1 1 2.34702419 1 1 0.281271175 0 1 -1.61874572 0 1 -1.221492045 1 1 -0.337275558 0 1 -0.187175308 0 1 -0.390771386 1 1 -0.702654054 0 1 -1.68456109 1 1 0.210267168 0 1 -0.865859823 1 1 -0.319988039 0 1 -2.084138415 0 1 0.877112521 1 1 -0.069248733 1 1 0.904053855