A recent political poll for a pending presidential election gave a 90% confidence interval for the population proportion of 0.485 to 0.505 for candidate A.What conclusion can be drawn from this information?
A)Candidate A may win the election but the sampling error is too large to make a firm prediction.
B)Candidate A should win the election since 0.5 is in the confidence interval.
C)There is a 90% likelihood that candidate A will win the election.
D)There is only a 0.495 chance that candidate A will win the election.

Question

Quizplus · Accepted Answer

The confidence interval gives a range of plausible values for the population proportion of candidate A, but it does not guarantee a win for candidate A. The sampling error is still quite large, so it is difficult to make a firm prediction based on this information alone. Therefore, choice A is the best answer since it acknowledges the uncertainty in the prediction.

A Recent Political Poll for a Pending Presidential Election Gave