condition mean min max ZT0-3 360.201153 360.201153 360.201153 ZT4-7 314.732277 314.732277 314.732277 ZT8-11 236.240586 236.240586 236.240586 ZT12-15 188.25309 188.25309 188.25309 ZT16-19 780.7747845000001 780.7747845000001 780.7747845000001 ZT20-23 801.174767 801.174767 801.174767