condition mean min max ZT0-3 89.05000000000001 89.05000000000001 89.05000000000001 ZT4-7 48.8 48.8 48.8 ZT8-11 53.099999999999994 53.099999999999994 53.099999999999994 ZT12-15 85.45 85.45 85.45 ZT16-19 90.2 90.2 90.2 ZT20-23 83.5 83.5 83.5