condition mean min max ZT0-3 10.240116 10.240116 10.240116 ZT4-7 12.313378499999999 12.313378499999999 12.313378499999999 ZT8-11 11.225849 11.225849 11.225849 ZT12-15 12.3960085 12.3960085 12.3960085 ZT16-19 11.019755 11.019755 11.019755 ZT20-23 12.238695 12.238695 12.238695