Scores on a University Exam Are Normally Distributed, with a Mean

question 32

Multiple Choice

Scores on a university exam are Normally distributed, with a mean of 78 and a standard deviation of 8. The professor teaching the class declares that a score of 70 or higher is required for a grade of at least C. Using the 68-95-99.7 rule, what percent of students failed to earn a grade of at least C?

• A)32%
• B)16%
• C)5%
• D)2.5%

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Definitions:

Medial Pontine Reticular Formation

A complex network of neurons located in the pons of the brainstem, involved in the regulation of motor coordination and sleep-wake cycles.

Peribrachial Area

A region in the brainstem involved in the modulation of sensory information, particularly with respect to pain and visceral inputs.

Cataplexy

Cataplexy is a sudden and transient episode of muscle weakness accompanied by full conscious awareness, typically triggered by emotions such as laughter, and often associated with narcolepsy.

Receptor Surface Area

The total area on a cell's surface where receptors, capable of binding specific substances, are located, influencing cell signaling and response.