condition mean min max ZT0-3 1132.95 1132.95 1132.95 ZT4-7 1474.4 1474.4 1474.4 ZT8-11 1281.0 1281.0 1281.0 ZT12-15 1468.45 1468.45 1468.45 ZT16-19 1336.1 1336.1 1336.1 ZT20-23 1285.9499999999998 1285.9499999999998 1285.9499999999998