condition mean min max ZT0-3 42.0241 39.141999999999996 44.9062 ZT4-7 33.1095 33.1095 33.1095 ZT8-11 43.69365 43.69365 43.69365 ZT12-15 0 0 0 ZT16-19 51.44095 51.44095 51.44095 ZT20-23 45.80145 45.80145 45.80145