The Density Function and the Cumulative Distribution Function for the Ages

question 17

Multiple Choice

The density function and the cumulative distribution function for the ages of people in an elementary school are graphed below. About what percent of the people in the school are adults? I. II.

• A)20%
• B)40%
• C)60%
• D)80%

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Definitions:

Arc

A continuous portion of a circle or other curved line, or in geological terms, a curved series of volcanic islands that form above a subducting plate.

Tectonic Terrane

A fault-bounded body of rock that has a different geologic history than adjacent regions.

Horst and Graben

Geological structures where a horst is a raised block of the earth's crust bordered by faults, and a graben is a lowered block of the earth's crust bordered by parallel faults.

Forearc Basin

A sedimentary basin that lies between the volcanic arc and the trench in a convergent plate boundary.