condition mean min max ZT0-3 6.632115000000001 6.632115000000001 6.632115000000001 ZT4-7 6.34028 6.34028 6.34028 ZT8-11 2.541055 2.541055 2.541055 ZT12-15 3.63113 3.63113 3.63113 ZT16-19 1.60543 1.60543 1.60543 ZT20-23 4.48123 4.48123 4.48123