condition mean min max ZT0-3 11.533199999999999 10.276499999999999 12.7899 ZT4-7 9.361335 9.361335 9.361335 ZT8-11 22.9162 22.9162 22.9162 ZT12-15 0 0 0 ZT16-19 28.6019 28.6019 28.6019 ZT20-23 18.54505 18.54505 18.54505