condition mean min max ZT0-3 1041.4 1041.4 1041.4 ZT4-7 1390.4 1390.4 1390.4 ZT8-11 1231.8 1231.8 1231.8 ZT12-15 1346.75 1346.75 1346.75 ZT16-19 1281.35 1281.35 1281.35 ZT20-23 1167.3000000000002 1167.3000000000002 1167.3000000000002