condition mean min max ZT0-3 13.414449999999999 12.1744 14.654499999999999 ZT4-7 10.3536 10.3536 10.3536 ZT8-11 12.67725 12.67725 12.67725 ZT12-15 0 0 0 ZT16-19 15.32655 15.32655 15.32655 ZT20-23 14.114149999999999 14.114149999999999 14.114149999999999