One measure of intelligence is the Stanford-Binet Intelligence Quotient (IQ). A study of a certain population finds that IQ scores have a bell-shaped distribution with a mean of 110 and a standard deviation of 5. What percentage of persons has an IQ score between 105 and 115? Round the percentage to the nearest integer.

Question

anonymous · Answer

In other words, what percent of scores lie within one standard deviation of the mean?  68%

anonymous · Answer

Empirical rule. They tell you its bell shaped

anonymous · Answer

mr banjo you were correct..thanks for the help