condition mean min max ZT0-3 14.149999999999999 14.149999999999999 14.149999999999999 ZT4-7 24.8 24.8 24.8 ZT8-11 51.5 51.5 51.5 ZT12-15 29.8 29.8 29.8 ZT16-19 91.25 91.25 91.25 ZT20-23 53.85 53.85 53.85