What is a Normal Distribution?
Next
section: Standard normal
Normal distributions are a family of distributions that have the same general
shape. They are symmetric with scores more concentrated in the middle than
in the tails. Normal distributions are sometimes described as bell shaped.
Examples of normal distributions are shown below. Notice that they
differ in how spread out they are. The area under each curve is the same.
The height of a normal distribution can be specified mathematically in terms
of two
parameters: the
mean (μ) and the
standard
deviation (σ).
View mathematical formula
Next
section: Standard normal