Assume that adults have IQ scores that are normally distributed with a mean of 98.5 and...
Assume that adults have IQ scores that are normally distributed with a mean of 98.5 and a standard deviation 17.6. Find the first quartile Upper Q 1, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.)
The first quartile is __
Homework Answers
z-value = -0.67
using central limit theorem,
x = mean + z*sigma
x = 98.5 -0.67*17.6
x = 86.708
The first quartile is 86.708
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