The Intelligence Quotient (IQ) Test Scores Are Normally Distributed with a Mean

question 55

Multiple Choice

The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a
Standard deviation of 15.
i. What is the probability that a person would score between 85 and 115?
ii. Given a class with 25 students, what is the probability that the class' average IQ score is between
85 and 115?

• A) 0.3414, 0.0228
• B) 0.6826, 0.9772
• C) 0.6826, Approximately zero
• D) 1.0, 0.9544

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Definitions:

Turgor

The pressure of fluid within a cell that contributes to its rigidity, often used as an indicator of hydration.

Emaciated

Describes an individual or animal that is abnormally thin or weak, typically because of severe malnourishment or illness.

Auscultate

The act of listening to the internal sounds of the body, typically using a stethoscope, for diagnostic purposes.

Stethoscope

A medical instrument used for listening to sounds within the body, such as the heartbeat or breathing, essential for diagnoses.