condition mean min max ZT0-3 138.0 138.0 138.0 ZT4-7 96.6 96.6 96.6 ZT8-11 91.1 91.1 91.1 ZT12-15 121.75 121.75 121.75 ZT16-19 126.14999999999999 126.14999999999999 126.14999999999999 ZT20-23 153.5 153.5 153.5