condition mean min max ZT0-3 0.04395725 0.0 0.0879145 ZT4-7 0.089699 0.089699 0.089699 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.43298000000000003 0.43298000000000003 0.43298000000000003 ZT20-23 0.087432 0.087432 0.087432