condition mean min max ZT0-3 11.00835 11.00835 11.00835 ZT4-7 10.579899999999999 10.579899999999999 10.579899999999999 ZT8-11 7.850695 7.850695 7.850695 ZT12-15 9.73063 9.73063 9.73063 ZT16-19 10.67016 10.67016 10.67016 ZT20-23 10.65875 10.65875 10.65875