The National Average on the ACT Math Test Is 20

question 47

Essay

The national average on the ACT math test is 20.5. A sample of n = 9 incoming college freshmen is tested at a local university. The mean of the sample is M = 22.7 with a s = 4. Does the sample mean differ significantly from the national average? Test at α = .05.

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Definitions:

Physiological Differences

Variations in the biological functions and processes of organisms, which can be influenced by genetics, environment, and lifestyle.

Cognition

Gaining awareness and understanding by engaging in thought, experiencing events, and through sensory detection.

Parasympathetic Nervous System

Part of the autonomic nervous system responsible for conserving energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles in the gastrointestinal tract.

Sympathetic Nervous System

A division of the autonomic nervous system that controls the body's responses to perceived threats by activating the fight-or-flight response.