A Statistics Professor Receives an Average of Five E-Mail Messages

question 1

Multiple Choice

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. What is the probability that on a randomly selected day she will have two messages?

• A)0.0067
• B)0.0014
• C)0.4200
• D)0.0842

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Definitions:

Thalamus

A major relay station in the brain's center through which all sensory information, except for smell, passes to the cerebral cortex.

Cortex

The outermost layer of the brain, involved in numerous high-level functions, including thought, memory, and sensory processing.

Two-Factor Theory

A psychological theory suggesting emotions are based on physiological arousal and cognitive labeling.

Cognitive Appraisal

The process of evaluating a situation in terms of its relevance to one's well-being and determining the appropriate reaction.