condition mean min max ZT0-3 58.1 58.1 58.1 ZT4-7 90.2 90.2 90.2 ZT8-11 54.349999999999994 54.349999999999994 54.349999999999994 ZT12-15 91.65 91.65 91.65 ZT16-19 117.05000000000001 117.05000000000001 117.05000000000001 ZT20-23 121.65 121.65 121.65