condition mean min max ZT0-3 1223.9 1223.9 1223.9 ZT4-7 1133.2 1133.2 1133.2 ZT8-11 1371.45 1371.45 1371.45 ZT12-15 1425.55 1425.55 1425.55 ZT16-19 1265.25 1265.25 1265.25 ZT20-23 1274.25 1274.25 1274.25