condition mean min max ZT0-3 276.18572 276.18572 276.18572 ZT4-7 364.7432925 364.7432925 364.7432925 ZT8-11 363.75121449999995 363.75121449999995 363.75121449999995 ZT12-15 347.12298050000004 347.12298050000004 347.12298050000004 ZT16-19 363.73447699999997 363.73447699999997 363.73447699999997 ZT20-23 251.5166135 251.5166135 251.5166135