condition mean min max ZT0-3 10.209963610500001 8.127500187 12.292427034 ZT4-7 14.02498176 12.626313015 15.423650505000001 ZT8-11 13.183972594 13.17592088 13.192024308 ZT12-15 12.422486195 10.974899534999999 13.870072855 ZT16-19 11.625881451249999 9.8183087125 13.433454189999999 ZT20-23 27.134505325 21.387075449999998 32.8819352