Guns make a unique marking on the bullets they fire and their shell casings. these markings are called ballistic fingerprints. an abcnews poll examined the opinions of americans on the enactment of a law " that would require every gun sold in the united states to be test-fired first, so law enforcement would have its fingerprints in case it were ever used in a crime." independent simple random samples were taken of 537 women and 495 men. when asked if they would support a ballisting fingerprinting law, 446 of the women said "yes" while 307 of the men said "yes." give a 99% confidence interval for the difference in the proportion of women and the proportion of men supporting the law. note: use women minus men in your proportion calculations and base your confidence interval on a pooled estimate of p.