condition mean min max ZT0-3 1158.924364 1158.924364 1158.924364 ZT4-7 1227.240369 1227.240369 1227.240369 ZT8-11 1196.0210795 1196.0210795 1196.0210795 ZT12-15 1126.8971885 1126.8971885 1126.8971885 ZT16-19 974.266912 974.266912 974.266912 ZT20-23 1018.0028715000001 1018.0028715000001 1018.0028715000001