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.Given a class with 25 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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