In 1975, a random sample of 1484 adult U.S. citizens was surveyed, and 193 strongly agreed with the statement, "People should take care of themselves". Then, in 1991, a survey of 1013 adult U.S. citizens showed that only 61 strongly agreed with the statement. Does this indicate that the proportion of U.S.adults who strongly agree with the given statement has dropped?
Two-Sample Z Test for the Difference in Proportions
Two-Sample T Test for the Difference in Means
Matched Pairs T Test for a Mean
One-Sample T Test for a Mean