condition mean min max ZT0-3 370.749052 370.749052 370.749052 ZT4-7 416.2821695 416.2821695 416.2821695 ZT8-11 387.0378685 387.0378685 387.0378685 ZT12-15 353.849666 353.849666 353.849666 ZT16-19 396.897433 396.897433 396.897433 ZT20-23 598.331983 598.331983 598.331983