condition mean min max ZT0-3 0.0043809 0.0043809 0.0043809 ZT4-7 0.024428 0.024428 0.024428 ZT8-11 0.0184661 0.0184661 0.0184661 ZT12-15 0.01498848 0.01498848 0.01498848 ZT16-19 0.0097397 0.0097397 0.0097397 ZT20-23 0.0 0.0 0.0