condition mean min max ZT0-3 179.2 179.2 179.2 ZT4-7 200.8 200.8 200.8 ZT8-11 239.79999999999998 239.79999999999998 239.79999999999998 ZT12-15 178.9 178.9 178.9 ZT16-19 204.35 204.35 204.35 ZT20-23 114.55 114.55 114.55