condition mean min max ZT0-3 80.55 80.55 80.55 ZT4-7 26.0 26.0 26.0 ZT8-11 68.55 68.55 68.55 ZT12-15 62.5 62.5 62.5 ZT16-19 48.2 48.2 48.2 ZT20-23 40.15 40.15 40.15