For ln(time) = -1.04 (25th percentile): Hazard ratio = e^(0.14 + (-0.88) (-1.04)) 2.48 For ln(time) = 0.104 (50th percentile): Hazard ratio = e^(0.14 + (-0.88) 0.104) 1.05 For ln(time) = 0.443 (75th percentile): Hazard ratio = e^(0.14 + (-0.88) 0.443) 0.67(is the calculation correct