condition mean min max ZT0-3 60.6 60.6 60.6 ZT4-7 5.6 5.6 5.6 ZT8-11 24.700000000000003 24.700000000000003 24.700000000000003 ZT12-15 25.1 25.1 25.1 ZT16-19 28.15 28.15 28.15 ZT20-23 45.05 45.05 45.05