The ACT Is an Exam Used by Colleges and Universities

question 33

Essay

The ACT is an exam used by colleges and universities to evaluate undergraduate applicants. The test scores are
normally distributed. In a recent year, the mean test score was 22.2 and the standard deviation was 4.9. The test
scores of four students selected at random are 16, 24, 9, and 35.
a)Find the z-scores that correspond to each value.
b)Determine whether any of the values are unusual.

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Definitions:

Cerebral Cortex

The outer layer of the cerebrum in the brain, involved in high-level functions such as conscious thought, language, and memory.

Limbic System

A complex system of nerves and networks in the brain, involved in instinct and mood control, as well as the processing of emotions and memories.

Somatic Nervous System

A part of the peripheral nervous system that consists of nerve fibers that send sensory information to the central nervous system and motor nerve fibers that project to skeletal muscle.

Central Nervous System

The part of the nervous system consisting of the brain and spinal cord, which processes and sends out neural information.