condition mean min max ZT0-3 26.1 26.1 26.1 ZT4-7 25.9 25.9 25.9 ZT8-11 34.65 34.65 34.65 ZT12-15 18.85 18.85 18.85 ZT16-19 30.1 30.1 30.1 ZT20-23 23.700000000000003 23.700000000000003 23.700000000000003