What percentage of the population has IQ scores under 85?
A) 5%
B) 15%
C) 25%
D) 30%

Name: What percentage of the population has IQ scores under 85? A) 5% B) 15% C) 25% D) 30%
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Question

Quizplus · Accepted Answer

IQ scores are typically distributed in a bell curve (normal distribution) with a mean of 100 and a standard deviation of 15. An IQ score of 85 is one standard deviation below the mean, and approximately 15% of the population falls below this score.

What Percentage of the Population Has IQ Scores Under 85