condition mean min max ZT0-3 0.3005345 0.273065 0.32800399999999996 ZT4-7 0.277535 0.277535 0.277535 ZT8-11 0.580789 0.580789 0.580789 ZT12-15 0 0 0 ZT16-19 0.54552 0.54552 0.54552 ZT20-23 0.6479775 0.6479775 0.6479775