condition mean min max ZT0-3 267.041 267.041 267.041 ZT4-7 187.97750000000002 187.97750000000002 187.97750000000002 ZT8-11 182.0755 182.0755 182.0755 ZT12-15 167.63299999999998 167.63299999999998 167.63299999999998 ZT16-19 271.0175 271.0175 271.0175 ZT20-23 279.84000000000003 279.84000000000003 279.84000000000003