condition mean min max ZT0-3 0.05555683333333333 0.0 0.1666705 ZT4-7 0.3386995 0.3386995 0.3386995 ZT8-11 0.0 0.0 0.0 ZT12-15 0.207673 0.0 0.415346 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0