condition mean min max ZT0-3 46.95 46.95 46.95 ZT4-7 75.0 75.0 75.0 ZT8-11 25.200000000000003 25.200000000000003 25.200000000000003 ZT12-15 45.5 45.5 45.5 ZT16-19 32.25 32.25 32.25 ZT20-23 59.2 59.2 59.2