condition mean min max ZT0-3 33.04425 29.945 34.77375 ZT4-7 38.127849999999995 38.127849999999995 38.127849999999995 ZT8-11 35.83175 35.83175 35.83175 ZT12-15 42.966875 42.576499999999996 43.35725 ZT16-19 49.90535 49.90535 49.90535 ZT20-23 40.590149999999994 40.590149999999994 40.590149999999994