condition mean min max ZT0-3 93.755143 93.755143 93.755143 ZT4-7 141.62217750000002 141.62217750000002 141.62217750000002 ZT8-11 140.67828250000002 140.67828250000002 140.67828250000002 ZT12-15 132.7521965 132.7521965 132.7521965 ZT16-19 136.0737555 136.0737555 136.0737555 ZT20-23 129.7093525 129.7093525 129.7093525