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Assume that adults have IQ scores that are normally distributed with a mean of 103.1 and a standard deviation 19.5. Find the first quartile Q1,

Assume that adults have IQ scores that are normally distributed with a mean of 103.1 and a standard deviation 19.5. Find the first quartile Q1, which is the IQ score separating the bottom25% from the top75%. (Hint: Draw agraph.)

The first quartile is

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