Assume that adults have IQ scores that are normally distributed with mean of 99.6 and a standard deviation 17.4. Find the first quartile Q,, which is the IQ score separating the bottom 25% from the...

Extracted text: Assume that adults have IQ scores that are normally distributed with mean of 99.6 and a standard deviation 17.4. Find the first quartile Q,, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.) The first quartile is (Type an integer or decimal rounded to one decimal place as needed.)