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Suppose that IQ scores have a bell-shaped distribution with a mean of 9696 and a standard...

Suppose that IQ scores have a bell-shaped distribution with a mean of 9696 and a standard deviation of 1414. Using the empirical rule, what percentage of IQ scores are no more than 6868? Please do not round your answer.

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Answer #1

68- 96-28 z score for 68 =-=-2.0 14 14 % 5% 100-3--= 2.5% For IQ scores no more than 68 P(z <-2) =

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