condition mean min max ZT0-3 4174.7 4174.7 4174.7 ZT4-7 3164.3 3164.3 3164.3 ZT8-11 3239.1499999999996 3239.1499999999996 3239.1499999999996 ZT12-15 3054.95 3054.95 3054.95 ZT16-19 3748.8 3748.8 3748.8 ZT20-23 4674.1 4674.1 4674.1