Question

7. An online poll at a popular web site asked the following:

   A nationwide ban of the diet supplement ephedra went into effect recently. The herbal stimulant has been linked to 155 deaths and many more heart attacks and strokes. Ephedra manufacturer NVE Pharmaceuticals, claiming that the FDA lacked proof that ephedra is dangerous if used as directed, was denied a temporary restraining order on the ban yesterday by a federal judge. Do you think that ephedra should continue to be banned nationwide?

   65% of the 17,303 respondents said “yes.” Comment on each of the following statements about this poll in one or two complete sentences.

   1. (a) With a sample size that large, we can be pretty certain we know the true proportion of Americans who think ephedra should be banned.

   2. (b) The wording of the question is clearly very biased.

   3. (c) The sampling frame is all Internet users.

   4. (d) This is a voluntary response survey, so the results can’t be reliably generalized to any population of interest.

Answer 1

Answer :

a)With a sample size that large, we can be pretty certain we know the true proportion of Americans who think ephedra should be banned.

Even through,we have an enormous example size,we may not be sure to state that it is true.Because we have taken this example with volunteers who are web users,so this ought to be biased. The coming about willful reactions predisposition nullifies the study.

b)The wording of the question is clearly very biased.

We need to ensure that the inquiry wording ought to be unbiased.

For example,asking an inquiry like "would you support an across the nation boycott of ephedra?will presumably bring about a higher level of individuals for the boycott than the basic inquiry like "would you say you are agreeable to or contradicted to an ephedra restricted across the country"?

c)The sampling frame is all Internet users.

This ought to be obviously one-sided on the grounds that this examining depends on willful reaction test.

d)This is a voluntary response survey, so the results can’t be reliably generalized to any population of interest.

Since this is an intentional reaction survey,we have inspected seriously with volunteers.The test isn't representative,even however every individual in the populace may have been offered the opportunity to react.