Question

In the 1970s and 1980s, PepsiCo, maker of Pepsi, began airing television commercials in which it claimed more cola drinkers preferred Pepsi over Coca-Cola in a blind taste test. The Coca-Cola Company, maker of Coca-Cola, was the market leader in soda sales. After the television ads began airing, Pepsi sales increased and began rivaling Coca-Cola sales. Assume the claim is that more than 50% of cola drinkers preferred Pepsi over Coca-Cola. You work for an independent market research firm and are asked to test this claim. EXERCISES: How Would You Do It? (a) When PepsiCo performed this challenge, PepsiCo representatives went to shopping malls to obtain their sample. Do you think this type of sampling is representative of the population? Explain. (b) What sampling technique would you use to select the sample for your study? (c) Identify possible flaws or biases in your study.

          In the 1970s and 1980s, PepsiCo, maker of Pepsi, began airing television commercials in which it claimed more cola drinkers preferred Pepsi over Coca-Cola in a blind taste test. The Coca-Cola Company, maker of Coca-Cola, was the market leader in soda sales. After the television ads began airing, Pepsi sales increased and began rivaling Coca-Cola sales. Assume the claim is that more than 50% of cola drinkers preferred Pepsi over Coca-Cola. You work for an independent market research firm and are asked to test this claim.

EXERCISES: How Would You Do It?
(a) When PepsiCo performed this challenge, PepsiCo representatives went to shopping malls to obtain their sample. Do you think this type of sampling is representative of the population? Explain.
(b) What sampling technique would you use to select the sample for your study?
(c) Identify possible flaws or biases in your study.

Added by Rachel C.

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