condition mean min max ZT0-3 1377.0 1377.0 1377.0 ZT4-7 553.7 553.7 553.7 ZT8-11 623.95 623.95 623.95 ZT12-15 926.5 926.5 926.5 ZT16-19 1389.0 1389.0 1389.0 ZT20-23 1395.6999999999998 1395.6999999999998 1395.6999999999998