condition mean min max ZT0-3 1158.95 1158.95 1158.95 ZT4-7 1482.3 1482.3 1482.3 ZT8-11 1726.5 1726.5 1726.5 ZT12-15 1586.9499999999998 1586.9499999999998 1586.9499999999998 ZT16-19 1424.0 1424.0 1424.0 ZT20-23 1181.4 1181.4 1181.4