Find the area of the shaded region The graph to the right de

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

Solution

The Z-score for the value of X is -

Z = (85 - 100)/15 = -1

So, the shaded area is the probability - P(Z < -1) = 0.1587