A Normal Probability Distribution A continuous random variable with a bell-shaped distribution is said to follow a Normal Distribution

1. You should now see the frequency distribution for our data. What shape do you believe best describes the distribution you see? You may have said skewed left, since the bell shape is a little bit pulled out on the left. However, for many statistical purposes, this is close enough to a symmetric bell-shaped distributionJ. It is generally accepted that pregnancy lengths follow a normal distribution. Though as you can see from your picture, it might not be as normal as some might say. We are going to go ahead and move forward with this activity assuming that the length of human pregnancies follow a normal distribution. Let's focus in on a small part of this graph to begin to look at Area in the graph