condition mean min max ZT0-3 1241.6 1241.6 1241.6 ZT4-7 1265.1 1265.1 1265.1 ZT8-11 1298.05 1298.05 1298.05 ZT12-15 1366.9 1366.9 1366.9 ZT16-19 1335.35 1335.35 1335.35 ZT20-23 1340.6 1340.6 1340.6