condition mean min max ZT0-3 9.377165000000002 8.830715000000001 9.923615 ZT4-7 4.222575 4.222575 4.222575 ZT8-11 5.947965 5.947965 5.947965 ZT12-15 0 0 0 ZT16-19 27.1829 27.1829 27.1829 ZT20-23 24.52835 24.52835 24.52835