An advertiser of a certain brand of aspirin (let's call it Brand B) claims that it is the preferred painkiller for headaches, on the basis of the results of a survey of headache sufferers. But further investigation reveals that the choices given to respondents were Tylenol, Extra-Strength Tylenol, Brand B aspirin, and Advil.
a. Is this an open- or closed-form question? Explain.
b. Comment on the choices given to respondents.
c. Comment on the advertiser's claim.
d. What choices do you think should have been given? Explain.