=+10.39 ▼ In a national survey of 2013 adults, 1590 responded that lack of respect and courtesy in American society is a serious problem, and 1283 indicated that they believe that rudeness is a more serious problem than in past years (Associated Press, April 3, 2002). Is there convincing evidence that more than three-quarters of U.S.

adults believe that rudeness is a worsening problem? Test the relevant hypotheses using a significance level of .05.