condition mean min max ZT0-3 0.25800275 0.191632 0.3243735 ZT4-7 0.6322935000000001 0.6322935000000001 0.6322935000000001 ZT8-11 0.330365 0.330365 0.330365 ZT12-15 0 0 0 ZT16-19 0.09422695 0.09422695 0.09422695 ZT20-23 0.3790265 0.3790265 0.3790265