condition mean min max ZT0-3 264.9 264.9 264.9 ZT4-7 247.0 247.0 247.0 ZT8-11 313.25 313.25 313.25 ZT12-15 427.15 427.15 427.15 ZT16-19 438.85 438.85 438.85 ZT20-23 363.15 363.15 363.15