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TABLE 10-9
A few years ago, Pepsi invited consumers to take the "Pepsi Challenge." Consumers were asked to decide which of two sodas, Coke or Pepsi, they preferred in a blind taste test. Pepsi was interested in determining what factors played a role in people's taste preferences. One of the factors studied was the gender of the consumer. Below are the results of analyses comparing the taste preferences of men and women with the proportions depicting preference for Pepsi.
Males: Females:
-Referring to Table 10-9, construct a 99% confidence interval estimate of the difference between the proportion of males and females who prefer Pepsi.
Double-Blind Control
An experimental setup where neither the participants nor the experimenters know who is receiving a particular treatment, minimizing bias.
Experimenter Bias
A method in which researchers involved in the study affect the outcomes to reflect a specific result.
Survey
A research method that involves collecting information from a sample of individuals through their responses to questions in order to gather data on opinions, behaviors, or characteristics.
Randomization
A process used in experimental designs to ensure that each participant has an equal chance of being assigned to any given group, aiming to eliminate bias.
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