condition mean min max ZT0-3 2693.8 2693.8 2693.8 ZT4-7 3644.5 3644.5 3644.5 ZT8-11 3260.3500000000004 3260.3500000000004 3260.3500000000004 ZT12-15 3152.7 3152.7 3152.7 ZT16-19 3064.55 3064.55 3064.55 ZT20-23 2846.8500000000004 2846.8500000000004 2846.8500000000004