condition mean min max ZT0-3 1193.5 1193.5 1193.5 ZT4-7 1283.8 1283.8 1283.8 ZT8-11 1273.0 1273.0 1273.0 ZT12-15 1041.4499999999998 1041.4499999999998 1041.4499999999998 ZT16-19 1329.5500000000002 1329.5500000000002 1329.5500000000002 ZT20-23 1377.25 1377.25 1377.25