condition mean min max ZT0-3 965.9000000000001 965.9000000000001 965.9000000000001 ZT4-7 1111.2 1111.2 1111.2 ZT8-11 1075.05 1075.05 1075.05 ZT12-15 1332.15 1332.15 1332.15 ZT16-19 1553.7 1553.7 1553.7 ZT20-23 1342.9499999999998 1342.9499999999998 1342.9499999999998