Question

# Suppose that IQ scores have a bell-shaped distribution with a mean of 101 and a standard...

Suppose that IQ scores have a bell-shaped distribution with a mean of 101 and a standard deviation of 12. Using the empirical rule, what percentage of IQ scores are no more than 125? Please do not round your answer.

Solution :

Using Empirical rule,

P( - 2< X < + 2) = 95%

P(X < 125) = 97.5%

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