condition mean min max ZT0-3 37.25 37.25 37.25 ZT4-7 47.6 47.6 47.6 ZT8-11 43.55 43.55 43.55 ZT12-15 48.300000000000004 48.300000000000004 48.300000000000004 ZT16-19 49.349999999999994 49.349999999999994 49.349999999999994 ZT20-23 68.85 68.85 68.85