Question

"Cola Wars" is the popular term for the intense competition between Coca-Cola and Pepsi. Their campaigns have featured movie and television stars, rock videos, athletic endorsements, and claims of consumer preference based on taste tests. Suppose, as part of a Canadian Pepsi marketing campaign, Pepsi wants to show that cola drinkers actually prefer Pepsi on taste alone. 1,000 cola consumers in Winnipeg Manitoba are given a blind taste test (i.e., a taste test in which the two brand names are disguised as either Brand A or Brand B). Each consumer is asked to state a preference from Brand A or Brand B, which the staff can then map back to Pepsi or Coca-Cola. The taste test is done at a mall over 3 weekends, asking for volunteers as customers enter a grocery store. What issues might arise when trying to infer from this sample to the larger pool of all consumers?

          "Cola Wars" is the popular term for the intense competition
between Coca-Cola and Pepsi.  Their campaigns have featured
movie and television stars, rock videos, athletic endorsements, and
claims of consumer preference based on taste tests.  
Suppose, as part of a Canadian Pepsi marketing campaign, Pepsi
wants to show that cola drinkers actually prefer Pepsi on taste
alone.  1,000 cola consumers in Winnipeg Manitoba are given a
blind taste test (i.e., a taste test in which the two brand names
are disguised as either Brand A or Brand B).  Each consumer is
asked to state a preference from Brand A or Brand B, which the
staff can then map back to Pepsi or Coca-Cola.  The taste test
is done at a mall over 3 weekends, asking for volunteers as
customers enter a grocery store.
What issues might arise when trying to infer from this sample to
the larger pool of all consumers?

Added by Andrea R.

Question

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