condition mean min max ZT0-3 0.7692410000000001 0.7692410000000001 0.7692410000000001 ZT4-7 1.43094 1.43094 1.43094 ZT8-11 3.56758 3.56758 3.56758 ZT12-15 1.454485 1.454485 1.454485 ZT16-19 2.7252899999999998 2.7252899999999998 2.7252899999999998 ZT20-23 1.1710543333333332 1.1710543333333332 1.1710543333333332