condition mean min max ZT0-3 9.655342 9.655342 9.655342 ZT4-7 10.1046495 10.1046495 10.1046495 ZT8-11 10.6829655 10.6829655 10.6829655 ZT12-15 11.300008 11.300008 11.300008 ZT16-19 10.703649500000001 10.703649500000001 10.703649500000001 ZT20-23 9.655979 9.655979 9.655979