condition mean min max ZT0-3 764.478868 764.478868 764.478868 ZT4-7 764.602323 764.602323 764.602323 ZT8-11 816.574891 816.574891 816.574891 ZT12-15 614.7921135 614.7921135 614.7921135 ZT16-19 813.6879105 813.6879105 813.6879105 ZT20-23 680.065224 680.065224 680.065224