condition mean min max ZT0-3 56.3 56.3 56.3 ZT4-7 45.1 45.1 45.1 ZT8-11 48.55 48.55 48.55 ZT12-15 76.1 76.1 76.1 ZT16-19 76.25 76.25 76.25 ZT20-23 77.5 77.5 77.5