condition mean min max ZT0-3 82.19999999999999 82.19999999999999 82.19999999999999 ZT4-7 121.4 121.4 121.4 ZT8-11 90.25 90.25 90.25 ZT12-15 67.19999999999999 67.19999999999999 67.19999999999999 ZT16-19 94.75 94.75 94.75 ZT20-23 70.15 70.15 70.15