condition mean min max ZT0-3 53.0 53.0 53.0 ZT4-7 56.5 56.5 56.5 ZT8-11 94.9 94.9 94.9 ZT12-15 52.85 52.85 52.85 ZT16-19 69.2 69.2 69.2 ZT20-23 102.4 102.4 102.4