In 2003, an organization surveyed 1,508 adult americans and asked about a certain war, "do you believe the united states made the right or wrong decision to use military force? " of the 1,508 adult americans surveyed, 1,085 stated the united states made the right decision. in 2008, the organization asked the same question of 1,508 adult americans and found that 570 believed the united states made the right decision.
1. construct and interpret a 90% confidence interval for the difference between the two population proportions, p 2003 - p 2008.