conc n tumor obs_odds ln_odds
0 50 2 0.0416666667 -3.17805383
2.1 54 5 0.1020408163 -2.282382386
5.4 46 5 0.1219512195 -2.104134154
8 51 10 0.243902439 -1.410986974
15 50 40 4 1.3862943611
19.5 52 42 4.2 1.4350845253