IQ Scores Are Normally Distributed with a Mean of 100

question 113

Multiple Choice

IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.Based on properties of the mathematical normal curve,which one of the following statements is TRUE?

• A)Approximately 90 percent of the scores fall between 85 and 115.
• B)A score of 70 is equally as probable as is a score of 130.
• C)There are more scores above 130 than below 85.
• D)There are more scores above the mean than below the mean.

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