Births in the US Occur at an Average Rate of 7.5

question 139

Multiple Choice

Births in the US occur at an average rate of 7.5 births per minute (Source: Census.gov, 2013) .Assume all the Poisson conditions are met.What is the standard deviation (in minutes) of the "time between births" random variable?

• A)0.13 minutes
• B)0.55 minutes
• C)7.5 minutes
• D)13.3 minutes

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Definitions:

Anterior Sclera

The front part of the sclera, the white, opaque outer protective covering of the eyeball.

Eyelids

Foldable covers made of skin and muscle that protect the eyes from debris and help in regulating the amount of light entering the eye.

Iris

The colored part of the eye surrounding the pupil, responsible for controlling the size of the pupil and thus the amount of light that enters the eye.

Photoreceptor Cells

Specialized neurons in the retina that convert light into electrical signals, enabling vision.