condition mean min max ZT0-3 54.2 54.2 54.2 ZT4-7 60.0 60.0 60.0 ZT8-11 25.1 25.1 25.1 ZT12-15 33.25 33.25 33.25 ZT16-19 63.5 63.5 63.5 ZT20-23 84.4 84.4 84.4