condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.029372766666666664 0.029372766666666664 0.029372766666666664 ZT12-15 0.019305199999999998 0.019305199999999998 0.019305199999999998 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0