condition mean min max ZT0-3 1410.6 1410.6 1410.6 ZT4-7 1265.7 1265.7 1265.7 ZT8-11 1314.95 1314.95 1314.95 ZT12-15 1169.1999999999998 1169.1999999999998 1169.1999999999998 ZT16-19 1246.65 1246.65 1246.65 ZT20-23 1424.2 1424.2 1424.2