condition mean min max ZT0-3 25.450000000000003 25.450000000000003 25.450000000000003 ZT4-7 7.0 7.0 7.0 ZT8-11 32.15 32.15 32.15 ZT12-15 32.15 32.15 32.15 ZT16-19 10.85 10.85 10.85 ZT20-23 49.95 49.95 49.95