condition mean min max ZT0-3 0.103987888 0.028323336 0.17965244 ZT4-7 0.57520561 0.4117454785 0.7386657415 ZT8-11 0.91678447775 0.8675913960000001 0.9659775595 ZT12-15 0.406430782 0.314260596 0.498600968 ZT16-19 0.18257476374999998 0.15386324699999998 0.2112862805 ZT20-23 0.1729103365 0.15216571750000002 0.1936549555