condition mean min max ZT0-3 0.814056 0.631598 0.996514 ZT4-7 1.324693 1.324693 1.324693 ZT8-11 0.32091000000000003 0.32091000000000003 0.32091000000000003 ZT12-15 0 0 0 ZT16-19 0.431188 0.431188 0.431188 ZT20-23 0.748231 0.748231 0.748231