condition mean min max ZT0-3 10.302505 10.302505 10.302505 ZT4-7 14.759047 14.759047 14.759047 ZT8-11 13.131644000000001 13.131644000000001 13.131644000000001 ZT12-15 12.196797 12.196797 12.196797 ZT16-19 12.9117405 12.9117405 12.9117405 ZT20-23 11.008380500000001 11.008380500000001 11.008380500000001