condition mean min max ZT0-3 815.25 815.25 815.25 ZT4-7 966.2 966.2 966.2 ZT8-11 859.55 859.55 859.55 ZT12-15 1087.5500000000002 1087.5500000000002 1087.5500000000002 ZT16-19 1002.25 1002.25 1002.25 ZT20-23 810.55 810.55 810.55