condition mean min max ZT0-3 57.7 57.7 57.7 ZT4-7 54.1 54.1 54.1 ZT8-11 60.5 60.5 60.5 ZT12-15 24.15 24.15 24.15 ZT16-19 48.25 48.25 48.25 ZT20-23 34.85 34.85 34.85