condition mean min max ZT0-3 0.008861375 0.0 0.01772275 ZT4-7 0.07334225 0.07334225 0.07334225 ZT8-11 0.0723127 0.0723127 0.0723127 ZT12-15 0 0 0 ZT16-19 0.0178879 0.0178879 0.0178879 ZT20-23 0.0357347 0.0357347 0.0357347