condition mean min max ZT0-3 132.699401 132.699401 132.699401 ZT4-7 133.241413 133.241413 133.241413 ZT8-11 148.995507 148.995507 148.995507 ZT12-15 150.7861475 150.7861475 150.7861475 ZT16-19 163.543927 163.543927 163.543927 ZT20-23 167.184008 167.184008 167.184008