The Number of Emergency Calls Received by a Switchboard in an Hour

question 43

Multiple Choice

The number of emergency calls received by a switchboard in an hour has an expected value of 0.5 and a standard deviation of 0.7.Find the mean and standard deviation of the number of emergency calls received by the switch board during a workshift lasting 4 hours.Assume that the hours are independent of each other.

• A)μ = 2,σ = 11.2
• B)μ = 1.00,σ = 2.8
• C)μ = 2,σ = 2.8
• D)μ = 2,σ = 1.40
• E)μ = 1.00,σ = 1.40

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Definitions:

Hypothalamus

A region of the brain that plays a crucial role in many important functions, including releasing hormones, regulating body temperature, and managing feelings of hunger and thirst.

Sensory Input

Information received by the body's sensory organs, which is then sent to the brain for processing.

Body Maintenance

The biological processes and behaviors that keep the body functioning properly, including repair and immune responses.