condition mean min max ZT0-3 61.45 61.45 61.45 ZT4-7 52.2 52.2 52.2 ZT8-11 54.7 54.7 54.7 ZT12-15 54.05 54.05 54.05 ZT16-19 51.3 51.3 51.3 ZT20-23 63.3 63.3 63.3