Question: A 30-minute consumer survey mailed to 500 adults aged 25-34 included a $10 gift certificate to Borders. The same survey was mailed to 500 adults aged 25-34 without the gift certificate. There were 185 responses from the first group and 45 from the second group. (a) At α = .025, did the gift certificate increase the response rate by at least 20 percent? (b) Find the p-value.