condition mean min max ZT0-3 0.6255725 0.6255725 0.6255725 ZT4-7 0.3979725 0.3979725 0.3979725 ZT8-11 0.4318375 0.4318375 0.4318375 ZT12-15 0.0 0.0 0.0 ZT16-19 0.3491735 0.3491735 0.3491735 ZT20-23 0.3419365 0.3419365 0.3419365