An Aptitude Test Has a Mean Score of 80 and a Standard

question 2

Essay

An aptitude test has a mean score of 80 and a standard deviation of 5. The population of scores is normally distributed.
-What proportion of tests has scores over 90?

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Definitions:

Gray Matter

A major component of the central nervous system, consisting of neuronal cell bodies, neuropil (dendrites and unmyelinated axons), glial cells, and capillaries, involved in muscle control, sensory perception, and decision making.

Myelin-Covered Axons

Nerve fibers that are encased in myelin, a fatty substance that speeds up the transmission of nerve impulses.

Electrical Currents

The flow of electric charge through a conductor, typically measured in amperes, and a fundamental concept in electrical engineering and physics.

Brain Damage

Physical harm to the brain that impairs its functions, potentially resulting from injury, disease, or neurological disorders.