condition mean min max ZT0-3 33.290975 31.13425 35.4477 ZT4-7 25.0066 25.0066 25.0066 ZT8-11 43.7422 43.7422 43.7422 ZT12-15 0 0 0 ZT16-19 47.4946 47.4946 47.4946 ZT20-23 38.724199999999996 38.724199999999996 38.724199999999996