condition mean min max ZT0-3 32.9 32.9 32.9 ZT4-7 55.4 55.4 55.4 ZT8-11 44.099999999999994 44.099999999999994 44.099999999999994 ZT12-15 90.69999999999999 90.69999999999999 90.69999999999999 ZT16-19 67.5 67.5 67.5 ZT20-23 48.2 48.2 48.2