In a national survey of 2000 adults, 1560 responded that lack of respect and courtesy in American society is a serious problem, and 1270 indicated that they believe that rudeness is a more serious problem than in past years. 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 0.05. (For z give the answer to two decimal places. For P give the answer to four decimal places.)
z=
p=