Suppose a random variable is normally distributed with a mean of 400 and a standard deviation of 100.
a. Draw a normal curve with the parameters labeled. This means that you label the mean, and all standard deviation tick marks on the horizontal axis.
b. Shade the region under the normal curve that represents that probability of observing a value of the random variable that is less than 600. You can do this on the graph for part A or you can do it on a "new" graph.
c. Suppose the area under the normal curve below 600 is 0.9772. Provide two interpretations of this area