The normal, a continuous distribution, is the most important of all the distributions. It is widely
used and even more widely abused. Its graph is bell-shaped. You see the bell curve in almost
all disciplines. Some of these include psychology, business, economics, the sciences, nursing,
and, of course, mathematics. Some of your instructors may use the normal distribution to help
determine your grade. Most IQ scores are normally distributed. Often real estate prices fit a
normal distribution. The normal distribution is extremely important but it cannot be applied to
