condition mean min max ZT0-3 39.1503 39.1503 39.1503 ZT4-7 28.7626 28.7626 28.7626 ZT8-11 28.693649999999998 28.693649999999998 28.693649999999998 ZT12-15 30.64945 30.64945 30.64945 ZT16-19 43.06515 43.06515 43.06515 ZT20-23 40.5245 40.5245 40.5245