Chapter 12, Problem 24E

(a)

To determine

To comment on each of the following statement about the poll.

Explanation of Solution

It is given in the question that an online poll at a website was asked. This question was based on the research that do you think that ephedra should continue to be banned nationwide. Thus, the comment on this was: With a sample size that large, we can be pretty certain we know the true proportion of Americans who think ephedra should be banned. Thus, we can say regarding the statement that since this is a voluntary response survey, the large sample size can still be affected by biases in the group of people who chose to respond.

(b)

To determine

To comment on each of the following statement about the poll.

Explanation of Solution

It is given in the question that an online poll at a website was asked. This question was based on the research that do you think that ephedra should continue to be banned nationwide. Thus, the comment on this was: The wording of the question is clearly very biased. Thus, we can say about the comment is that the wording is not necessarily biased since it only states the facts that lead to the respondents making a justified conclusion.

(c)

To determine

To comment on each of the following statement about the poll.

Explanation of Solution

It is given in the question that an online poll at a website was asked. This question was based on the research that do you think that ephedra should continue to be banned nationwide. Thus, the comment on this was: The sampling frame is all internet users. Thus, we can say about the comment that the sampling frame would be all Internet users who see this online poll because not all Internet users will be able to see this poll.

(d)

To determine

To comment on each of the following statement about the poll.

Explanation of Solution

It is given in the question that an online poll at a website was asked. This question was based on the research that do you think that ephedra should continue to be banned nationwide. Thus, the comment on this was: Results of this voluntary response survey cannot be reliable generalized to any population of interest. Thus, we can say about this comment that this is true because this survey displays response bias where only the individuals who see this poll would be able to voice their opinions.