condition mean min max ZT0-3 2.2002450000000002 0.8899 3.51059 ZT4-7 0.8981545 0.8981545 0.8981545 ZT8-11 0.6514709999999999 0.6514709999999999 0.6514709999999999 ZT12-15 0 0 0 ZT16-19 1.202693 1.202693 1.202693 ZT20-23 0.7679704999999999 0.7679704999999999 0.7679704999999999