condition mean min max ZT0-3 34.55 34.55 34.55 ZT4-7 72.4 72.4 72.4 ZT8-11 60.05 60.05 60.05 ZT12-15 60.75 60.75 60.75 ZT16-19 56.349999999999994 56.349999999999994 56.349999999999994 ZT20-23 74.05000000000001 74.05000000000001 74.05000000000001