In a Distribution with a Mean of 100 and a Standard

question 30

Multiple Choice

In a distribution with a mean of 100 and a standard deviation of 15, what is the probability that a score will be 115 or higher?

• A)16%
• B)34%
• C)50%
• D)84%

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Definitions:

Hematite

An iron oxide mineral with a metallic luster and reddish-brown streak, commonly used as an ore of iron.

Magnetite

A magnetic mineral form of iron(II,III) oxide, often found in igneous and metamorphic rocks.

Quartz

A hard, crystalline mineral composed of silicon dioxide, widely used in jewelry and as an industrial abrasive.

Feldspar

A group of silicate minerals that are among the most abundant minerals in the Earth's crust, commonly found in igneous, metamorphic, and sedimentary rocks.