condition mean min max ZT0-3 368.6 368.6 368.6 ZT4-7 365.5 365.5 365.5 ZT8-11 408.75 408.75 408.75 ZT12-15 404.2 404.2 404.2 ZT16-19 460.95 460.95 460.95 ZT20-23 327.0 327.0 327.0