A survey reported in Time magazine included the question ‘‘Do you favor a federal law requiring a 15 day waiting period to purchase a gun?” Results from a random sample of US citizens showed that 318 of the 520 men who were surveyed supported this proposed law while 379 of the 460 women sampled said ‘‘yes.’’ Use this information to find and interpret a 90% confidence interval for the difference in the proportions of men and women who agree with this proposed law.