condition mean min max ZT0-3 54.65 54.65 54.65 ZT4-7 70.1 70.1 70.1 ZT8-11 75.95 75.95 75.95 ZT12-15 77.25 77.25 77.25 ZT16-19 84.65 84.65 84.65 ZT20-23 105.1 105.1 105.1