In a representative sample of 2,013 American adults, 1,590 indicated that lack of respect and courtesy in

Question:

In a representative sample of 2,013 American adults, 1,590 indicated that lack of respect and courtesy in American society is a serious problem (Associated Press, April 3, 2002). Is there convincing evidence that more than three-quarters of American adults believe that lack of respect and courtesy is a serious problem? Test the relevant hypotheses using a significance level of 0.05.