condition mean min max ZT0-3 48.45 48.45 48.45 ZT4-7 119.3 119.3 119.3 ZT8-11 85.75 85.75 85.75 ZT12-15 92.94999999999999 92.94999999999999 92.94999999999999 ZT16-19 85.2 85.2 85.2 ZT20-23 46.15 46.15 46.15