condition mean min max ZT0-3 0.34958575000000003 0.229166 0.4700055 ZT4-7 0.7093349999999999 0.7093349999999999 0.7093349999999999 ZT8-11 1.426045 1.426045 1.426045 ZT12-15 0 0 0 ZT16-19 1.154688 1.154688 1.154688 ZT20-23 0.9260935 0.9260935 0.9260935