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

question 114

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 no messages?

• A) 0.0067
• B) Zero
• C) 0.0335
• D) Impossible to have no messages

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Definitions:

Peptide Hormone

Type of hormone that is a protein, a peptide, a glycoprotein, or is derived from an amino acid.

Hypothalamus

A region of the brain that controls a variety of functions including temperature regulation, hunger, and thirst, as well as hormones.

Posterior Pituitary

Portion of the pituitary gland that stores and secretes oxytocin and antidiuretic hormone produced by the hypothalamus.

Positive Feedback

Mechanism of homeostatic response in which the output of the system intensifies and increases the activity of the system.