condition mean min max ZT0-3 1.1056135 0.6474635 1.5637634999999999 ZT4-7 0.9366209999999999 0.9366209999999999 0.9366209999999999 ZT8-11 2.196485 2.196485 2.196485 ZT12-15 0 0 0 ZT16-19 0.6769209999999999 0.6769209999999999 0.6769209999999999 ZT20-23 1.560305 1.560305 1.560305