condition mean min max ZT0-3 15.825379934249998 6.702195603 24.948564265499996 ZT4-7 32.93349423 32.0952817 33.77170676 ZT8-11 26.494687695 26.170092335 26.819283055 ZT12-15 9.790777732999999 5.499379536999999 14.082175929 ZT16-19 8.206552474999999 6.624964712500001 9.788140237499999 ZT20-23 10.79086899775 10.2168500805 11.364887915