condition mean min max ZT0-3 35.666850000000004 30.12245 40.6957 ZT4-7 19.09675 19.09675 19.09675 ZT8-11 5.44958 5.44958 5.44958 ZT12-15 2.24789375 1.522181 2.9736065 ZT16-19 3.027055 3.027055 3.027055 ZT20-23 6.37938 6.37938 6.37938