condition mean min max ZT0-3 5.814187499999999 5.35903 6.2693449999999995 ZT4-7 4.160525 4.160525 4.160525 ZT8-11 3.6678550000000003 3.6678550000000003 3.6678550000000003 ZT12-15 0 0 0 ZT16-19 1.752535 1.752535 1.752535 ZT20-23 2.93422 2.93422 2.93422