condition mean min max ZT0-3 913.95 913.95 913.95 ZT4-7 740.0 740.0 740.0 ZT8-11 651.6500000000001 651.6500000000001 651.6500000000001 ZT12-15 686.95 686.95 686.95 ZT16-19 881.25 881.25 881.25 ZT20-23 1004.8000000000001 1004.8000000000001 1004.8000000000001