condition mean min max ZT0-3 0.295551 0.1967405 0.39436150000000003 ZT4-7 0.0 0.0 0.0 ZT8-11 0.1949065 0.1949065 0.1949065 ZT12-15 0 0 0 ZT16-19 0.581217 0.581217 0.581217 ZT20-23 0.0 0.0 0.0