condition mean min max ZT0-3 0.0181067 0.0 0.028022 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.014982825 0.0 0.02996565 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0