condition mean min max ZT0-3 56.65 56.65 56.65 ZT4-7 10.4 10.4 10.4 ZT8-11 55.95 55.95 55.95 ZT12-15 47.65 47.65 47.65 ZT16-19 49.5 49.5 49.5 ZT20-23 69.55 69.55 69.55