condition mean min max ZT0-3 0.14317385000000002 0.123323 0.16302470000000002 ZT4-7 0.08226875 0.08226875 0.08226875 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0809205 0.0809205 0.0809205 ZT20-23 0.28494030000000004 0.28494030000000004 0.28494030000000004