condition mean min max ZT0-3 754.5999999999999 754.5999999999999 754.5999999999999 ZT4-7 830.4 830.4 830.4 ZT8-11 822.7 822.7 822.7 ZT12-15 695.1 695.1 695.1 ZT16-19 759.1500000000001 759.1500000000001 759.1500000000001 ZT20-23 726.35 726.35 726.35