Graphical Analysis of the Bell Curve (Normal Distribution)
The standard normal distribution has a graph that is called the bell curve. It's centered at z = 0 and has a total area of 1.
If we know the value of z, we can use any mathematical tool to find the area of the area before the value of z. It's called the left-tail area.
Conversely, if we have the area, we can find the value of z that has that area. It's called the inverse normal function.
We'll use Excel to calculate the z-score, given the area = 0.3520.
Result: z = -0.38