condition mean min max ZT0-3 9.6511425 9.55145 9.750835 ZT4-7 20.0538 20.0538 20.0538 ZT8-11 16.479755 16.479755 16.479755 ZT12-15 0 0 0 ZT16-19 15.402650000000001 15.402650000000001 15.402650000000001 ZT20-23 10.12444 10.12444 10.12444