condition mean min max ZT0-3 2122.8999999999996 2122.8999999999996 2122.8999999999996 ZT4-7 2701.9 2701.9 2701.9 ZT8-11 2628.8500000000004 2628.8500000000004 2628.8500000000004 ZT12-15 2721.85 2721.85 2721.85 ZT16-19 2710.6 2710.6 2710.6 ZT20-23 2536.8500000000004 2536.8500000000004 2536.8500000000004