condition mean min max ZT0-3 1.7436699999999998 1.7436699999999998 1.7436699999999998 ZT4-7 1.964655 1.964655 1.964655 ZT8-11 0.378456 0.378456 0.378456 ZT12-15 0.5132675 0.5132675 0.5132675 ZT16-19 2.14872 2.14872 2.14872 ZT20-23 2.165995 2.165995 2.165995