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

question 93

Multiple Choice

The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a standard deviation of 15. Given a class with 9 students, what is the probability that the class' average IQ score is between 85 and 115?

• A) 0.4987
• B) 3.00
• C) 0.0026
• D) 0.9974

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