An online poll at a popular web site asked the following:
A nationwide ban of the...
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An online poll at a popular web site asked the following:
A nationwide ban of the diet supplement ephedra went into effectrecently. The herbal stimulant has been linked to 155 deaths andmany more heart attacks and strokes. Ephedra manufacturer NVEPharmaceuticals, claiming that the FDA lacked proof that ephedra isdangerous if used as directed, was denied a temporary restrainingorder on the ban yesterday by a federal judge. Do you think thatephedra should continue to be banned nationwide?
65% of the 17,303 respondents said “yes.” Comment on each of thefollowing statements about this poll in one or two completesentences.
(a) With a sample size that large, we can be pretty certain weknow the true proportion of Americans who think ephedra should bebanned.
(b) The wording of the question is clearly very biased.
(c) The sampling frame is all Internet users.
(d) This is a voluntary response survey, so the results can’t bereliably generalized to any population of interest.
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Answer aWith a sample size that large we can be pretty certain we know the true proportion of Americans who think ephedra should be banned Even throughwe have an enormous example sizewe may not be sure to state that it is trueBecause we have taken
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