condition mean min max ZT0-3 1058.37675 994.5485000000001 1122.205 ZT4-7 440.055 440.055 440.055 ZT8-11 123.67349999999999 123.67349999999999 123.67349999999999 ZT12-15 0 0 0 ZT16-19 544.458 544.458 544.458 ZT20-23 591.1875 591.1875 591.1875