condition mean min max ZT0-3 19.3 19.3 19.3 ZT4-7 44.8 44.8 44.8 ZT8-11 35.1 35.1 35.1 ZT12-15 58.349999999999994 58.349999999999994 58.349999999999994 ZT16-19 55.4 55.4 55.4 ZT20-23 26.700000000000003 26.700000000000003 26.700000000000003