condition mean min max ZT0-3 73.68091666666666 38.23185 107.00795 ZT4-7 34.779650000000004 34.779650000000004 34.779650000000004 ZT8-11 62.623400000000004 62.623400000000004 62.623400000000004 ZT12-15 94.122975 86.85900000000001 101.38695 ZT16-19 108.622 108.622 108.622 ZT20-23 122.42150000000001 122.42150000000001 122.42150000000001