condition mean min max ZT0-3 9.5410896205 8.174173141 10.9080061 ZT4-7 9.57405100975 8.847491936 10.3006100835 ZT8-11 11.00476982725 10.1949352245 11.81460443 ZT12-15 9.991583302999999 9.3930083615 10.5901582445 ZT16-19 13.1852453075 12.095392624999999 14.27509799 ZT20-23 18.3902094625 17.24270147 19.537717455