condition mean min max ZT0-3 85.7 85.7 85.7 ZT4-7 60.7 60.7 60.7 ZT8-11 43.099999999999994 43.099999999999994 43.099999999999994 ZT12-15 80.1 80.1 80.1 ZT16-19 64.35 64.35 64.35 ZT20-23 79.3 79.3 79.3