IQ Scores Are Normally Distributed with a Mean of 100

question 113

Multiple Choice

IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.Based on properties of the mathematical normal curve,which one of the following statements is TRUE?

• A)Approximately 90 percent of the scores fall between 85 and 115.
• B)A score of 70 is equally as probable as is a score of 130.
• C)There are more scores above 130 than below 85.
• D)There are more scores above the mean than below the mean.

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Definitions:

UV-visible Spectrum

The absorption or reflectance spectrum in the ultraviolet and visible light region that is used to identify chemical substances.

Aromatic Hydrocarbons

Compounds made up of hydrogen and carbon that contain a planar ring of continuously overlapping p-orbitals, known for their stability and unique chemical behavior.

IR Spectrum

A graphical representation of the infrared light absorption of a substance, used to identify chemical bonds and functional groups within a molecule.

M-xylene

An isomer of xylene with two methyl groups attached to the benzene ring in the meta positions, used as a solvent and chemical precursor.