condition mean min max ZT0-3 13.27145 13.27145 13.27145 ZT4-7 10.692775000000001 10.692775000000001 10.692775000000001 ZT8-11 30.58005 30.58005 30.58005 ZT12-15 33.26265 33.26265 33.26265 ZT16-19 23.5012 23.5012 23.5012 ZT20-23 13.29635 13.29635 13.29635