condition mean min max ZT0-3 10.790875 10.65685 10.924900000000001 ZT4-7 11.84585 11.84585 11.84585 ZT8-11 11.583400000000001 11.583400000000001 11.583400000000001 ZT12-15 0 0 0 ZT16-19 14.567250000000001 14.567250000000001 14.567250000000001 ZT20-23 15.8767 15.8767 15.8767