condition mean min max ZT0-3 32.0 32.0 32.0 ZT4-7 53.9 53.9 53.9 ZT8-11 10.75 10.75 10.75 ZT12-15 13.75 13.75 13.75 ZT16-19 42.4 42.4 42.4 ZT20-23 47.0 47.0 47.0