condition mean min max ZT0-3 12.211500000000001 12.211500000000001 12.211500000000001 ZT4-7 7.764535 7.764535 7.764535 ZT8-11 12.06105 12.06105 12.06105 ZT12-15 10.81035 10.81035 10.81035 ZT16-19 14.54675 14.54675 14.54675 ZT20-23 8.09294 8.09294 8.09294