condition mean min max ZT0-3 25.134900000000002 24.1752 26.0946 ZT4-7 16.0848 16.0848 16.0848 ZT8-11 17.719 17.719 17.719 ZT12-15 0 0 0 ZT16-19 25.360799999999998 25.360799999999998 25.360799999999998 ZT20-23 28.0978 28.0978 28.0978