condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.482071 0.482071 0.482071 ZT8-11 0.483734 0.483734 0.483734 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0