condition mean min max ZT0-3 30.200000000000003 30.200000000000003 30.200000000000003 ZT4-7 45.7 45.7 45.7 ZT8-11 56.15 56.15 56.15 ZT12-15 47.15 47.15 47.15 ZT16-19 42.8 42.8 42.8 ZT20-23 30.700000000000003 30.700000000000003 30.700000000000003