condition mean min max ZT0-3 12.978144 12.978144 12.978144 ZT4-7 12.635284500000001 12.635284500000001 12.635284500000001 ZT8-11 11.339388 11.339388 11.339388 ZT12-15 11.738272 11.738272 11.738272 ZT16-19 10.6842275 10.6842275 10.6842275 ZT20-23 10.532119 10.532119 10.532119