condition mean min max ZT0-3 32.805175 29.35885 36.2515 ZT4-7 50.451899999999995 50.451899999999995 50.451899999999995 ZT8-11 74.4076 74.4076 74.4076 ZT12-15 0 0 0 ZT16-19 58.20695 58.20695 58.20695 ZT20-23 55.119550000000004 55.119550000000004 55.119550000000004