In the Most Recent Election, 19 Percent of All Eligible

question 107

Multiple Choice

In the most recent election, 19 percent of all eligible college students voted. If a random sample of 20 students were surveyed, find the probability that none of the students voted.

• A) .0000
• B) .0014
• C) .0148
• D) .9852

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Definitions:

Signal-Detection Theory

The theory that perceiving or not perceiving a stimulus is actually a judgment about whether a momentary sensory experience is due to background noise alone or to the background noise plus a signal.

Classical Psychophysical

Relates to the traditional study of the relationships between physical stimuli and the sensations and perceptions they produce.

Sensitivity

The capacity to perceive, feel, or be aware of stimuli or changes in the environment; can also refer to the degree of responsiveness to social or emotional matters.

Weber Fraction

A principle that quantifies the perception of change in a given stimulus, stating that the just noticeable difference is a constant proportion of the original stimulus’s intensity.