condition mean min max ZT0-3 64.95 64.95 64.95 ZT4-7 34.5 34.5 34.5 ZT8-11 36.6 36.6 36.6 ZT12-15 74.65 74.65 74.65 ZT16-19 63.2 63.2 63.2 ZT20-23 60.85 60.85 60.85