condition mean min max ZT0-3 3.53485 3.508915 3.560785 ZT4-7 2.15203 2.15203 2.15203 ZT8-11 4.000505 4.000505 4.000505 ZT12-15 0 0 0 ZT16-19 5.057525 5.057525 5.057525 ZT20-23 5.004545 5.004545 5.004545