condition mean min max ZT0-3 1586.032115 1586.032115 1586.032115 ZT4-7 1539.912702 1539.912702 1539.912702 ZT8-11 1704.8289184999999 1704.8289184999999 1704.8289184999999 ZT12-15 1838.0881825000001 1838.0881825000001 1838.0881825000001 ZT16-19 1759.3302945 1759.3302945 1759.3302945 ZT20-23 1531.8790144999998 1531.8790144999998 1531.8790144999998