condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0227734 0.0 0.0455468 ZT16-19 0.0 0.0 0.0 ZT20-23 0.04798735 0.04798735 0.04798735