condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0317841 0.0317841 0.0317841 ZT8-11 0.03086145 0.03086145 0.03086145 ZT12-15 0 0 0 ZT16-19 0.0307573 0.0307573 0.0307573 ZT20-23 0.0309809 0.0309809 0.0309809