condition mean min max ZT0-3 9.240319 9.240319 9.240319 ZT4-7 10.276345500000001 10.276345500000001 10.276345500000001 ZT8-11 10.0151485 10.0151485 10.0151485 ZT12-15 8.504176000000001 8.504176000000001 8.504176000000001 ZT16-19 10.6165935 10.6165935 10.6165935 ZT20-23 8.7045325 8.7045325 8.7045325