condition mean min max ZT0-3 12163.8 12163.8 12163.8 ZT4-7 12447.9 12447.9 12447.9 ZT8-11 11716.0 11716.0 11716.0 ZT12-15 11543.8 11543.8 11543.8 ZT16-19 12770.349999999999 12770.349999999999 12770.349999999999 ZT20-23 12564.8 12564.8 12564.8