condition mean min max ZT0-3 1050.309396 1050.309396 1050.309396 ZT4-7 238.644348 238.644348 238.644348 ZT8-11 45.464542 45.464542 45.464542 ZT12-15 22.1897715 22.1897715 22.1897715 ZT16-19 20.190356 20.190356 20.190356 ZT20-23 188.759227 188.759227 188.759227