condition mean min max ZT0-3 484.016641 484.016641 484.016641 ZT4-7 202.585694 202.585694 202.585694 ZT8-11 166.949566 166.949566 166.949566 ZT12-15 212.03059199999998 212.03059199999998 212.03059199999998 ZT16-19 343.9369365 343.9369365 343.9369365 ZT20-23 353.958747 353.958747 353.958747