condition mean min max ZT0-3 29.5293 28.9675 30.0911 ZT4-7 27.3355 27.3355 27.3355 ZT8-11 41.1635 41.1635 41.1635 ZT12-15 0 0 0 ZT16-19 48.1156 48.1156 48.1156 ZT20-23 37.27905 37.27905 37.27905