condition mean min max ZT0-3 11.2047775 8.180105000000001 14.22945 ZT4-7 1.7719200000000002 1.7719200000000002 1.7719200000000002 ZT8-11 3.28307 3.28307 3.28307 ZT12-15 0 0 0 ZT16-19 8.749805 8.749805 8.749805 ZT20-23 6.734755 6.734755 6.734755