condition mean min max ZT0-3 2.6331499999999997 1.9016199999999999 3.36468 ZT4-7 6.88151 6.88151 6.88151 ZT8-11 10.655245 10.655245 10.655245 ZT12-15 0 0 0 ZT16-19 9.161175 9.161175 9.161175 ZT20-23 6.261735 6.261735 6.261735