In 1980, a random sample of 1.556 people were asked to respond to the statement: "Capitalism must be altered before any significant improvements in human welfare can be realized." Of these sample members, 38.4% agreed with the statement. When the same statement was presented to a random sample of 1.108 people in 1989, 52.0% agreed. Test the null hypothesis that the population proportions agreeing with this statement were the same in the two years, against the alternative that a higher proportion agreed in 1989.