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Asked Oct 13, 2019
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SAT Math scores have a bell-shaped distribution with a mean of 515 and a standard deviation of 114. Use the empirical rule 

a) What percentage of SAT scores is between 401 and 629

b) What percentage of SAT score is less than 401 or greater than 629?

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Expert Answer

Empirical rule:

If the distribution is bell shaped, the Empirical Rule can be used. The Empirical ru...

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68% of the data lie in (μ- σ,μ + σ) . 95% of the data lie in (μ-2σ, μ + 2σ) . 99.7% of the data lie in (μ- 3σ,μ + 3σ )

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