condition mean min max ZT0-3 4.898195 4.898195 4.898195 ZT4-7 4.797105 4.797105 4.797105 ZT8-11 7.930434999999999 7.930434999999999 7.930434999999999 ZT12-15 8.950365 8.950365 8.950365 ZT16-19 7.380240000000001 7.380240000000001 7.380240000000001 ZT20-23 4.393834999999999 4.393834999999999 4.393834999999999