condition mean min max ZT0-3 21.479775 18.5039 24.45565 ZT4-7 26.278950000000002 26.278950000000002 26.278950000000002 ZT8-11 19.611649999999997 19.611649999999997 19.611649999999997 ZT12-15 0 0 0 ZT16-19 26.8306 26.8306 26.8306 ZT20-23 26.4638 26.4638 26.4638