Assume that adults have IQ scores that are normally distributed with a mean of 103.5 and a standard deviation of 25. Find the probability that a randomly selected adult has an IQ greater than 137.0. (Hint: Draw a graph.) The probability that a randomly selected adult from this group has an IQ greater than 137.0 is . (Round to four decimal places as needed.)

Assume that adults have IQ scores that are normally distributed with a mean of 98.4 and a standard deviation 20.3. 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 enter your response here. ​(Type an integer or decimal rounded to one decimal place as​ needed.)

The amount of rain falling in Waimea Canyon State Park, Kauai is normally distributed with a mean of 42.9 inches, and a standard deviation of 6 inches. What is the probability that the mean rain of 9 randomly picked days will exceed 46.2 inches? P(x > 46.2 inches) = P(z > Shade the appropriate area (for graphing purposes, only, round z to one decimal place): Shade: Left of a value Click and drag the arrows to adjust the values. 1 -/ -1.5 4 -3 -2 3 4 2.

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. Click to view page 1 of the table. Click to view page 2 of the table. 0.6 The indicated IQ score, x, is (Round to one decimal place as needed.)