In a recent year, a poll asked 2603 random adult citizens of a large country how they rated economic conditions. in the poll, 22% rated the economy as excellent/good. a recent media outlet claimed that the percentage of citizens who felt the economy was in excellent/good shape was 19%. does the poll support this claim?
a) test the appropriate hypothesis. find a 90% confidence interval for the proportion of adults who rated the economy as excellent/good. check conditions.
b) does your confidence interval provide evidence to support the claim?
c) what is the significance level of the test in b? explain.