condition mean min max ZT0-3 1156.3000000000002 1156.3000000000002 1156.3000000000002 ZT4-7 925.6 925.6 925.6 ZT8-11 892.45 892.45 892.45 ZT12-15 816.6 816.6 816.6 ZT16-19 870.65 870.65 870.65 ZT20-23 1147.05 1147.05 1147.05