condition mean min max ZT0-3 44.213750000000005 44.213750000000005 44.213750000000005 ZT4-7 30.804000000000002 30.804000000000002 30.804000000000002 ZT8-11 30.4672 30.4672 30.4672 ZT12-15 38.4738 38.4738 38.4738 ZT16-19 54.455200000000005 54.455200000000005 54.455200000000005 ZT20-23 53.34625 53.34625 53.34625