condition mean min max ZT0-3 0.2437675 0.2437675 0.2437675 ZT4-7 0.30895550000000005 0.30895550000000005 0.30895550000000005 ZT8-11 0.7561135 0.7561135 0.7561135 ZT12-15 0.4603545 0.4603545 0.4603545 ZT16-19 1.080745 1.080745 1.080745 ZT20-23 0.468125 0.468125 0.468125