condition mean min max ZT0-3 32.15 32.15 32.15 ZT4-7 16.2 16.2 16.2 ZT8-11 25.85 25.85 25.85 ZT12-15 27.8 27.8 27.8 ZT16-19 46.650000000000006 46.650000000000006 46.650000000000006 ZT20-23 24.450000000000003 24.450000000000003 24.450000000000003