condition mean min max ZT0-3 27.2976 17.9366 33.192499999999995 ZT4-7 15.8398 15.8398 15.8398 ZT8-11 12.93385 12.93385 12.93385 ZT12-15 16.986449999999998 12.896049999999999 21.07685 ZT16-19 14.658850000000001 14.658850000000001 14.658850000000001 ZT20-23 23.580550000000002 23.580550000000002 23.580550000000002