condition mean min max ZT0-3 48.401583333333335 45.147450000000006 50.50485 ZT4-7 44.146649999999994 44.146649999999994 44.146649999999994 ZT8-11 46.3484 46.3484 46.3484 ZT12-15 60.109275000000004 58.25085 61.96770000000001 ZT16-19 52.037099999999995 52.037099999999995 52.037099999999995 ZT20-23 48.278000000000006 48.278000000000006 48.278000000000006