Compute Probabilities of a Poisson Random Variable

question 66

Multiple Choice

Compute Probabilities of a Poisson Random Variable
-The university police department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with a mean of 5.2 tickets per day. Find the probability that exactly nine tickets are written on a randomly selected day from this distribution.

• A) 0.042261
• B) 0.001393
• C) 0.000945
• D) 0.000031

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Definitions:

Vasomotor Center

Area within the medulla oblongata that regulates the diameter of blood vessels by way of the sympathetic nervous system.

Blood Colloid Osmotic Pressure

Pressure exerted by plasma proteins on capillary walls, which helps to maintain the water balance between blood and interstitial fluid.

Capillary

Small, thin-walled blood vessels that connect arterioles and venules, and facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between blood and tissues.

Baroreceptors

Sensory nerve endings found in the walls of arteries and the heart that sense changes in blood pressure.