condition mean min max ZT0-3 60.1 60.1 60.1 ZT4-7 62.6 62.6 62.6 ZT8-11 65.75 65.75 65.75 ZT12-15 44.85 44.85 44.85 ZT16-19 57.5 57.5 57.5 ZT20-23 49.75 49.75 49.75