Suppose a Fair Coin Is Flipped Twice and the Number

question 18

Multiple Choice

Suppose a fair coin is flipped twice and the number of heads is counted.Which of the following is a valid probability model for the number of heads observed in two flips?

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Definitions:

Sensory Adaptation

The method through which sensory detectors decrease their sensitivity to unchanging stimuli over a period.

Absolute Threshold

The minimum intensity of a stimulus that one can perceive, marking the boundary between non-detection and detection of a stimulus.

Weber's Law

A principle in psychology that states the smallest change in a stimulus, such as weight or brightness, that can be detected is a constant proportion of the stimulus level.

Absolute Threshold

The minimum stimulus intensity required to detect a stimulus at least half the time.