condition mean min max ZT0-3 7.25 7.25 7.25 ZT4-7 36.5 36.5 36.5 ZT8-11 24.15 24.15 24.15 ZT12-15 29.549999999999997 29.549999999999997 29.549999999999997 ZT16-19 9.85 9.85 9.85 ZT20-23 28.299999999999997 28.299999999999997 28.299999999999997