condition mean min max ZT0-3 137.822169 137.822169 137.822169 ZT4-7 102.71642700000001 102.71642700000001 102.71642700000001 ZT8-11 99.4210735 99.4210735 99.4210735 ZT12-15 92.8647125 92.8647125 92.8647125 ZT16-19 143.972006 143.972006 143.972006 ZT20-23 145.5235395 145.5235395 145.5235395