condition mean min max ZT0-3 1.2982550000000002 1.2982550000000002 1.2982550000000002 ZT4-7 0.9339569999999999 0.9339569999999999 0.9339569999999999 ZT8-11 1.9758300000000002 1.9758300000000002 1.9758300000000002 ZT12-15 2.015485 2.015485 2.015485 ZT16-19 2.508655 2.508655 2.508655 ZT20-23 0.9109750000000001 0.9109750000000001 0.9109750000000001