condition mean min max ZT0-3 48.849999999999994 48.849999999999994 48.849999999999994 ZT4-7 172.6 172.6 172.6 ZT8-11 150.7 150.7 150.7 ZT12-15 103.45 103.45 103.45 ZT16-19 56.75 56.75 56.75 ZT20-23 32.85 32.85 32.85