condition mean min max ZT0-3 0.43597725 0.3592025 0.512752 ZT4-7 0.8181005 0.8181005 0.8181005 ZT8-11 0.48972899999999997 0.48972899999999997 0.48972899999999997 ZT12-15 0 0 0 ZT16-19 0.899019 0.899019 0.899019 ZT20-23 0.4517105 0.4517105 0.4517105