condition mean min max ZT0-3 41.02035 41.02035 41.02035 ZT4-7 28.136 28.136 28.136 ZT8-11 70.2909 70.2909 70.2909 ZT12-15 98.0459 98.0459 98.0459 ZT16-19 89.17564999999999 89.17564999999999 89.17564999999999 ZT20-23 56.426 56.426 56.426