condition mean min max ZT0-3 248.3 248.3 248.3 ZT4-7 231.8 231.8 231.8 ZT8-11 294.55 294.55 294.55 ZT12-15 423.25 423.25 423.25 ZT16-19 429.9 429.9 429.9 ZT20-23 308.8 308.8 308.8