condition mean min max ZT0-3 24.824833333333334 22.3654 27.6507 ZT4-7 25.30095 25.30095 25.30095 ZT8-11 22.67585 22.67585 22.67585 ZT12-15 33.685675 33.66325 33.7081 ZT16-19 23.53265 23.53265 23.53265 ZT20-23 23.31455 23.31455 23.31455