condition mean min max ZT0-3 1212.9 1212.9 1212.9 ZT4-7 1195.1 1195.1 1195.1 ZT8-11 1149.6999999999998 1149.6999999999998 1149.6999999999998 ZT12-15 1087.65 1087.65 1087.65 ZT16-19 1239.55 1239.55 1239.55 ZT20-23 986.95 986.95 986.95