condition mean min max ZT0-3 0.5664916666666667 0.2952435 0.7641985 ZT4-7 0.281633 0.281633 0.281633 ZT8-11 0.290127 0.290127 0.290127 ZT12-15 0.9517975000000001 0.9319250000000001 0.97167 ZT16-19 0.664872 0.664872 0.664872 ZT20-23 0.932888 0.932888 0.932888