condition mean min max ZT0-3 0.57395725 0.37788099999999997 0.7700335 ZT4-7 1.826895 1.826895 1.826895 ZT8-11 2.207555 2.207555 2.207555 ZT12-15 0 0 0 ZT16-19 2.27164 2.27164 2.27164 ZT20-23 1.899865 1.899865 1.899865