Suppose That Only 2 Percent of All People Are Geniuses

question 23

Multiple Choice

Suppose that only 2 percent of all people are geniuses. If an IQ test indicates that Albert is a genius, but the test is only accurate 90 percent of the time, then the probability that Albert really is a genius is roughly:

• A)18 percent.
• B)2 percent.
• C)10 percent.
• D)16 percent

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Definitions:

Oceanic Crust

The thin layer of the Earth's crust that underlies the ocean basins, composed mainly of basalt.

Mantle

The layer of the Earth located between the crust and the outer core, composed of silicate rocks rich in iron and magnesium.

Gravity

The force exerted between any two objects, such as that between the Sun, Earth, and Moon; synonymous with gravitational pull.

Sun

The star at the center of our solar system, which provides light and heat essential for life on Earth.