In: Statistics and Probability
Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15.
The area of the shaded region is _______ (Round to four decimal places as needed.)
Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15.
The indicated IQ score is _______ (Round to the nearest whole number as needed.)
Assume that adults have IQ scores that are normally distributed with a mean of 102.9 and a standard deviation 23.5. 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.)