A Few Years Ago, Pepsi Invited Consumers to Take the "Pepsi

question 46

Multiple Choice

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 interesting in determining what factors played a role in people's taste preferences. One of the factors studied was the gender of the consumer. Data on the percentage of men and women depicting preference for Pepsi were collected. Which of the following tests will you use to find out if there is any difference in preference between the different gender groups?

• A) McNemar test
• B) Paired t test
• C) Z test for difference in proportions
• D) Wilcoxon rank sum test

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Definitions:

Neural Pruning

The process by which extra neurons and synaptic connections are eliminated in order to increase the efficiency of neuronal transmissions.

Absolute Threshold

The minimum intensity of a stimulus that is required for the stimulus to be detected at least 50% of the time.

Just Noticeable Difference Threshold

The minimum difference in intensity between two stimuli required for the difference to be detected at least half the time.

Ultraviolet

A type of electromagnetic radiation with wavelengths shorter than those of visible light but longer than those of X-rays.