condition mean min max ZT0-3 3.90714 2.79235 5.02193 ZT4-7 3.538755 3.538755 3.538755 ZT8-11 3.183915 3.183915 3.183915 ZT12-15 0 0 0 ZT16-19 3.1193 3.1193 3.1193 ZT20-23 5.138960000000001 5.138960000000001 5.138960000000001