condition mean min max ZT0-3 13.539063 13.539063 13.539063 ZT4-7 15.154204499999999 15.154204499999999 15.154204499999999 ZT8-11 17.712889 17.712889 17.712889 ZT12-15 75.73234000000001 75.73234000000001 75.73234000000001 ZT16-19 19.3407245 19.3407245 19.3407245 ZT20-23 16.2136265 16.2136265 16.2136265