condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.508512 0.508512 0.508512 ZT12-15 0.14755300000000002 0.14755300000000002 0.14755300000000002 ZT16-19 0.261897 0.261897 0.261897 ZT20-23 0.330947 0.330947 0.330947