condition mean min max ZT0-3 76.5 76.5 76.5 ZT4-7 53.4 53.4 53.4 ZT8-11 39.4 39.4 39.4 ZT12-15 42.95 42.95 42.95 ZT16-19 79.55 79.55 79.55 ZT20-23 92.35 92.35 92.35