condition mean min max ZT0-3 56.35 56.35 56.35 ZT4-7 14.2 14.2 14.2 ZT8-11 47.800000000000004 47.800000000000004 47.800000000000004 ZT12-15 57.85 57.85 57.85 ZT16-19 57.5 57.5 57.5 ZT20-23 63.2 63.2 63.2