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

question 12

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 130 or more on the test?
ii. You enrolled in a class of 25 students. What is the probability that the class' average IQ exceeds 130?

• A) 0.0228, 0.4987
• B) 0.4772, 0.300
• C) 0.4772, 0.0026
• D) 0.0228, approximately zero

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