The gallup poll asks respondents how they rate honesty of people in different fields. the percentage of respondents who ranked clergy highly was 60% in 2000 and 54% in 2005. assume that each year the results are based on simple random samples of 100 people. we would like to determine if the drop in percentage is real or chance.
a. should you use a one-sample z-test or two-sample z-test. why?
b. formulate the null and alternative hypotheses.
c. can the difference between 60% and 54% be explained by chance or was it something else?