A Student Answered 50 of 80 True/false Questions Correctly

question 15

Multiple Choice

A student answered 50 of 80 true/false questions correctly. Does this performance indicate that the student knew something, or was he just lucky? (Hint: Use chi-squared and α = .05.)

• A) Chi-square =2.5; he knew something.
• B) Chi-square =2.5; he was lucky.
• C) Chi-square =5.0; he knew something.
• D) Chi-square =5.0; he was lucky.

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Definitions:

Autonomic Nervous System

The part of the nervous system that controls involuntary functions of the body, including heart rate, digestion, and respiratory rate, divided into the sympathetic and parasympathetic systems.

Parasympathetic

Part of the autonomic nervous system that conserves energy by slowing the heart rate and increasing intestinal and gland activity.

Sympathetic

Part of the autonomic nervous system involved in the body's fight or flight response, regulating heart rate, blood flow, and other functions.

Epinephrine

A hormone and neurotransmitter also known as adrenaline; it increases heart rate, constricts blood vessels, and dilates air passages.