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Assume that adults have IQ scores that are normally distributed with a mean of 100.6 and a standard deviation 17.8. Find the first quartile Q1,

Assume that adults have IQ scores that are normally distributed with a mean of

100.6 and a standard deviation 17.8. Find the first quartile Q1, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.)

The first quartile is =

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