condition mean min max ZT0-3 10.014173 10.014173 10.014173 ZT4-7 11.460589 11.460589 11.460589 ZT8-11 9.893272 9.893272 9.893272 ZT12-15 11.244437000000001 11.244437000000001 11.244437000000001 ZT16-19 10.300195500000001 10.300195500000001 10.300195500000001 ZT20-23 9.8032985 9.8032985 9.8032985